1 00:00:02,000 --> 00:00:07,000 Downloaded from YTS.MX 2 00:00:02,002 --> 00:00:04,087 NARRATOR: A turbo charged hunt, 3 00:00:05,797 --> 00:00:07,841 and a powerful bite, 4 00:00:08,000 --> 00:00:13,000 Official YIFY movies site: YTS.MX 5 00:00:09,259 --> 00:00:12,303 are the iconic shark superpowers. 6 00:00:14,389 --> 00:00:18,727 But is it possible to measure this raw power in the wild? 7 00:00:22,272 --> 00:00:24,983 Two experts want to find out. 8 00:00:25,066 --> 00:00:26,818 BROCQ: Everybody biting, everybody biting. 9 00:00:27,444 --> 00:00:29,070 NARRATOR: By using the latest tech. 10 00:00:29,154 --> 00:00:31,614 ANDY: That is the fastest drone I have ever seen. 11 00:00:31,698 --> 00:00:34,367 NARRATOR: On these apex ocean predators. 12 00:00:34,451 --> 00:00:35,994 BROCQ (over radio): Shark coming in, shark coming in. 13 00:00:36,077 --> 00:00:37,704 NARRATOR: But they’ll have to go hard. 14 00:00:37,787 --> 00:00:39,330 BROCQ (over radio): It's going off down here. 15 00:00:39,414 --> 00:00:40,540 NARRATOR: And fast. 16 00:00:40,707 --> 00:00:41,916 -MARK: Go, go. -ANDY: Go! 17 00:00:42,000 --> 00:00:46,588 NARRATOR: As they attempt to put shark speed and bite force to the test. 18 00:00:46,671 --> 00:00:48,131 ANDY: Wow, yeah, he’s biting my fin. 19 00:00:49,632 --> 00:00:52,844 BROCQ (over radio): Yep she got it. Oh it’s a good bite. 20 00:00:53,053 --> 00:00:57,682 NARRATOR: Can they reveal the truth behind shark superpower? 21 00:00:57,766 --> 00:01:01,811 (theme music playing) 22 00:01:05,899 --> 00:01:08,443 NARRATOR: Shark pro and cinematographer Brocq Maxey 23 00:01:08,526 --> 00:01:10,737 and his team are in the Bahamas. 24 00:01:13,073 --> 00:01:16,910 They’re about to undertake a ground-breaking new experiment. 25 00:01:19,871 --> 00:01:23,625 With the advice from scientists they’ll attempt to demonstrate 26 00:01:23,708 --> 00:01:26,836 the power of a shark’s bite, in the wild. 27 00:01:29,506 --> 00:01:34,761 And not just any shark, but two of the world’s biggest 28 00:01:34,844 --> 00:01:38,807 and most powerful sharks. The hammerhead. 29 00:01:41,559 --> 00:01:43,186 And the tiger shark. 30 00:01:48,441 --> 00:01:51,402 DAN: Studying bite force is a terrific way to come to understand 31 00:01:51,486 --> 00:01:53,321 why sharks have been such dominant predators 32 00:01:53,404 --> 00:01:55,490 for over 400 million years. 33 00:01:57,158 --> 00:01:59,035 NARRATOR: You can tell a lot about a shark 34 00:01:59,119 --> 00:02:01,371 just from looking at its bite. 35 00:02:03,706 --> 00:02:08,378 How it lives, and how it hunts. 36 00:02:11,464 --> 00:02:14,884 Every species has a slightly different technique. 37 00:02:15,426 --> 00:02:19,389 One that’s evolved to perfectly suit their prey and environment 38 00:02:22,058 --> 00:02:25,270 But when it comes to the power behind the bite, 39 00:02:25,353 --> 00:02:27,021 we still have a lot to learn. 40 00:02:30,024 --> 00:02:32,777 DAN: Measuring voluntary bite forces on free swimming sharks 41 00:02:32,861 --> 00:02:35,989 in the wild is a really difficult thing to do. 42 00:02:36,531 --> 00:02:38,700 NARRATOR: So far most of our knowledge comes 43 00:02:38,783 --> 00:02:41,661 from captive species or computer modeling. 44 00:02:43,204 --> 00:02:47,709 But how do these results stack up when it comes to sharks in the wild? 45 00:02:49,085 --> 00:02:50,670 The only way to find out, 46 00:02:52,338 --> 00:02:57,552 is to take bite force science out of the lab, and into the ocean. 47 00:02:58,344 --> 00:03:01,222 Something that will take a level of skill possessed only 48 00:03:01,347 --> 00:03:04,434 by shark experts like Brocq and his team. 49 00:03:06,936 --> 00:03:10,398 BROCQ: Forever, sharks have been a part of, part of my life. 50 00:03:10,481 --> 00:03:13,651 I grew up in the Bahamas. When it comes to diving with sharks, 51 00:03:13,735 --> 00:03:16,905 I understand that they’re better than me down there. 52 00:03:16,988 --> 00:03:21,367 I definitely have a fear that leads to an understanding and a respect. 53 00:03:22,702 --> 00:03:24,662 NARRATOR: Brocq has spent his career working on 54 00:03:24,746 --> 00:03:29,584 marine research projects, filming and handling sharks. 55 00:03:30,793 --> 00:03:33,838 Skills this mission will test to the max. 56 00:03:36,674 --> 00:03:40,595 So how do you measure the power behind these jaws, 57 00:03:40,678 --> 00:03:42,513 and live to tell the tale? 58 00:03:44,891 --> 00:03:47,936 You build the ultimate shark chew-toy! 59 00:03:49,729 --> 00:03:51,940 Because this has never been done before, 60 00:03:52,106 --> 00:03:54,984 the team commission a bespoke piece of equipment. 61 00:03:57,737 --> 00:04:02,492 A device sensitive enough to capture the force of a shark’s bite in the wild. 62 00:04:02,784 --> 00:04:06,120 But robust enough not to get crushed in the process. 63 00:04:09,916 --> 00:04:12,752 Okay so this is the bite force gauge. 64 00:04:13,044 --> 00:04:16,297 We’re trying to get the shark to give us a bite pretty much 65 00:04:16,381 --> 00:04:19,217 in the middle here. At the end of the device here is the mechanism 66 00:04:19,300 --> 00:04:24,639 which is sending a signal up to this box which is giving us the bite force. 67 00:04:26,432 --> 00:04:28,059 NARRATOR: Bite force will be measured as 68 00:04:28,142 --> 00:04:30,770 the weight bearing down on the gauge. 69 00:04:30,853 --> 00:04:34,190 As the shark bites, the reading will show in pounds. 70 00:04:35,525 --> 00:04:37,610 You can actually see when I push down... 71 00:04:37,694 --> 00:04:39,237 -(grunts) -(beeps) 72 00:04:39,988 --> 00:04:42,907 So that was 105 pounds of force. 73 00:04:42,991 --> 00:04:44,784 And that’s basically what we’re trying to get the shark to do 74 00:04:44,993 --> 00:04:47,745 and then we can make an assessment on who around 75 00:04:47,829 --> 00:04:50,415 these parts is giving us the most bite force. 76 00:04:51,708 --> 00:04:54,711 NARRATOR: To make sure no human or shark gets harmed 77 00:04:54,794 --> 00:04:57,505 the team will need to take extreme care. 78 00:04:58,923 --> 00:05:03,177 Even for an expert like Brocq, getting a reading won’t be easy 79 00:05:04,345 --> 00:05:07,098 DAN: First you need to get the animals to come in close enough 80 00:05:07,181 --> 00:05:11,060 to wherever you are, whether it’s as scuba divers or up on a boat. 81 00:05:11,311 --> 00:05:15,315 Then you need to get the shark to bite down in a specific spot 82 00:05:15,398 --> 00:05:17,191 to get any kind of good data. 83 00:05:18,234 --> 00:05:21,446 NARRATOR: Before they search out the hammerheads and tiger sharks, 84 00:05:21,529 --> 00:05:26,284 Brocq and dive instructor Lil want to test it on something a little smaller. 85 00:05:26,367 --> 00:05:29,120 We’re actually going to try to use it initially here 86 00:05:29,203 --> 00:05:31,831 at the surface with the lemon sharks. 87 00:05:31,914 --> 00:05:35,501 We’re going to try to entice one of them to bite the gauge. 88 00:05:38,588 --> 00:05:43,051 -Everybody ready? Lil you good? -I'm ready! 89 00:05:46,137 --> 00:05:48,681 BROCQ: Okay! All right, everybody biting! Everybody biting! 90 00:05:50,183 --> 00:05:52,852 NARRATOR: The gauge has been fitted with handles so that 91 00:05:52,935 --> 00:05:55,938 Brocq can keep his hands away from hungry mouths. 92 00:05:59,650 --> 00:06:03,946 They may be smaller but these lemon sharks still have plenty of teeth. 93 00:06:05,823 --> 00:06:08,326 BROCQ: Oh bite it. Creepy. 94 00:06:09,243 --> 00:06:11,704 Oh yeah. (grunts) 95 00:06:11,788 --> 00:06:14,624 Oh he’s got it. Good bite. 96 00:06:15,458 --> 00:06:17,085 (laughs) 97 00:06:17,168 --> 00:06:21,172 -Lil what did we get? -Yeah I got a reading of 168. 98 00:06:21,381 --> 00:06:23,007 Oh, that looks good. 99 00:06:24,384 --> 00:06:27,929 NARRATOR: Success. They’ve got their first bite force reading. 100 00:06:30,556 --> 00:06:34,185 At 168 pounds the result seemed to tie up 101 00:06:34,268 --> 00:06:36,437 with previous lab-based estimates. 102 00:06:38,106 --> 00:06:41,567 But it’s still a surprisingly low number for an apex predator 103 00:06:43,653 --> 00:06:47,824 Barely matching the 170 pound bite of a German shepherd dog. 104 00:06:49,951 --> 00:06:52,328 But this was just the warm up. 105 00:06:53,538 --> 00:06:57,917 The next shark they’re hoping to test, will be much more of a challenge. 106 00:06:59,210 --> 00:07:03,131 What will this set of jaws do to the bite force gauge? 107 00:07:04,465 --> 00:07:07,468 Hammerheads do most of their hunting on the sea floor. 108 00:07:08,928 --> 00:07:11,556 Scanning for sting rays and squid. 109 00:07:14,058 --> 00:07:17,270 Their mouths are much smaller than other sharks. 110 00:07:19,647 --> 00:07:22,316 Will that affect how hard they bite? 111 00:07:27,738 --> 00:07:31,784 We’re here in Bimini, the Bahamas, this is probably the best place 112 00:07:31,868 --> 00:07:34,662 in the world to dive with great hammerhead sharks. 113 00:07:36,205 --> 00:07:39,917 What we're gonna try to do is entice a hammerhead 114 00:07:40,001 --> 00:07:42,086 to come in and give it a bite. 115 00:07:43,212 --> 00:07:46,591 This is the first time that it’s really ever been done. 116 00:07:46,674 --> 00:07:50,595 It could be a bit of trial and error, their mouth is a bit up under their body, 117 00:07:50,678 --> 00:07:53,473 so it’s going to be a little difficult to get the device in a 118 00:07:53,556 --> 00:07:55,516 position where they’re going to give it a good bite. 119 00:08:05,776 --> 00:08:09,697 NARRATOR: Brocq heads down to the sea floor where the hammerheads hunt. 120 00:08:11,449 --> 00:08:14,660 Nurse sharks are quick to sniff out the chum, 121 00:08:15,119 --> 00:08:17,205 but Brocq’s not here for them. 122 00:08:18,623 --> 00:08:23,002 He’s here, for this. 123 00:08:23,961 --> 00:08:25,213 BROCQ (over radio): Oh here she comes. 124 00:08:27,089 --> 00:08:29,550 This hammer is an absolute bus, 125 00:08:29,634 --> 00:08:32,303 which is gonna be good for our bite force gauge. 126 00:08:36,098 --> 00:08:40,186 Try and give her one or two feeds, just so she starts getting used to us. 127 00:08:42,605 --> 00:08:45,316 NARRATOR: By carefully guiding the shark by the nose, 128 00:08:45,399 --> 00:08:47,485 Brocq has some control over their movement. 129 00:08:49,153 --> 00:08:52,406 Beautiful hammer. Oh, she’s big! 130 00:08:53,324 --> 00:08:55,701 NARRATOR: It’s a move that should only be attempted 131 00:08:55,785 --> 00:08:58,871 by experienced shark handlers, like Brocq. 132 00:09:01,040 --> 00:09:04,377 Having dived these waters for almost two decades, 133 00:09:04,460 --> 00:09:07,672 he knows these sharks and how to read their mood. 134 00:09:09,048 --> 00:09:11,300 BROCQ: She looks like she’s ready to rock. 135 00:09:13,094 --> 00:09:17,515 NARRATOR: They liked the fish but what will they make of the bite force gauge? 136 00:09:18,599 --> 00:09:19,767 BROCQ: Here she comes... 137 00:09:21,686 --> 00:09:23,437 Stand by, stand by. 138 00:09:27,525 --> 00:09:29,944 Nope, no luck. 139 00:09:34,824 --> 00:09:36,742 Going for a bite, stand by. 140 00:09:41,163 --> 00:09:42,540 (grunts) 141 00:09:42,957 --> 00:09:45,918 Didn’t bite down on the gauge, just took the piece of bait. 142 00:09:51,799 --> 00:09:54,135 Stand by Lil, she’s coming in.. 143 00:09:55,886 --> 00:09:57,054 She looks good. 144 00:09:58,973 --> 00:10:00,308 (groans) 145 00:10:00,850 --> 00:10:03,603 NARRATOR: Brocq’s struggling to get the gauge into the shark’s mouth. 146 00:10:04,395 --> 00:10:07,398 The hammerhead’s very wary of the giant piece of metal 147 00:10:07,607 --> 00:10:09,775 he’s trying to get the shark to bite down on. 148 00:10:10,443 --> 00:10:11,736 Stand by. 149 00:10:19,368 --> 00:10:21,078 (groans) 150 00:10:21,621 --> 00:10:26,584 She, she just used a little bit of her teeth just to take what she needed. 151 00:10:27,251 --> 00:10:29,253 She’s not really giving us a bite down. 152 00:10:32,256 --> 00:10:36,552 NARRATOR: The hammerheads are taking the bait without biting the gauge. 153 00:10:38,596 --> 00:10:41,682 (groans) BROCQ: I’m coming up. 154 00:10:48,105 --> 00:10:49,357 It is not easy. 155 00:10:50,191 --> 00:10:53,527 So, um, I think we knew that it was going to be difficult. 156 00:10:54,153 --> 00:10:57,990 NARRATOR: The large female hammerhead has Brocq out-foxed. 157 00:10:59,033 --> 00:11:01,035 BROCQ: She’s a great feeder but as soon as you try to present 158 00:11:01,118 --> 00:11:05,039 her with the bite force gauge, she becomes smarter than me. 159 00:11:05,122 --> 00:11:06,082 (laughs) 160 00:11:06,499 --> 00:11:09,919 She’s been coming in nicely, comes right up to the bite force gauge 161 00:11:10,002 --> 00:11:12,421 and she’s almost like using the tip of her teeth to 162 00:11:12,546 --> 00:11:17,301 just take the piece of bait out so she’s not really giving us a solid bite. 163 00:11:17,802 --> 00:11:18,761 We’ll keep on trying. 164 00:11:26,936 --> 00:11:30,147 NARRATOR: Shark expert Brocq Maxey is investigating 165 00:11:30,439 --> 00:11:34,318 the power of a shark’s bite by using a shark size chew-toy. 166 00:11:35,778 --> 00:11:41,701 Taking his results straight from the jaws of one of the Bahamas biggest sharks, 167 00:11:43,661 --> 00:11:44,870 the hammerhead. 168 00:11:45,705 --> 00:11:46,747 BROCQ (over radio): All right, stand-by. 169 00:11:47,748 --> 00:11:52,503 NARRATOR: It’s not been easy but Brocq’s hoping perseverance will pay off. 170 00:11:56,090 --> 00:11:58,175 All right, she’s coming back in. 171 00:12:00,386 --> 00:12:02,430 Oh bite. 172 00:12:04,974 --> 00:12:06,475 What’d you get Lil? 173 00:12:06,559 --> 00:12:09,812 Brocq on that last one I got 104.7. 174 00:12:11,230 --> 00:12:13,524 NARRATOR: More of a nibble than a bite. 175 00:12:14,734 --> 00:12:19,905 The sharks are playing the system, taking the bait without taking a bite. 176 00:12:20,865 --> 00:12:25,202 BROCQ: She’s coming around. All right, going for a bite. 177 00:12:30,499 --> 00:12:34,754 Yeah, she’s got it. Oh it's a good bite, what’d you guys get? 178 00:12:35,963 --> 00:12:40,050 Uh, so we just got a really big reading, 505.5. 179 00:12:40,760 --> 00:12:44,805 NARRATOR: Success, the first known bite reading from a hammerhead in the wild. 180 00:12:45,514 --> 00:12:46,640 That’s pretty good. 181 00:12:47,975 --> 00:12:50,811 NARRATOR: This 11 foot hammerhead bit down 182 00:12:50,895 --> 00:12:53,063 with over 500 pounds of force. 183 00:12:55,649 --> 00:13:01,280 For their prey that’s like being crushed by the weight of two NFL players. 184 00:13:03,449 --> 00:13:08,662 But surprisingly this result isn’t top league when compared to other predators. 185 00:13:13,501 --> 00:13:18,339 The strongest bite in the animal kingdom belongs to the saltwater crocodile. 186 00:13:21,217 --> 00:13:23,177 Hippos are another high hitter. 187 00:13:26,889 --> 00:13:29,433 DAN: When we compare sharks to other groups of animals, 188 00:13:29,517 --> 00:13:31,018 what we find is that they actually 189 00:13:31,101 --> 00:13:32,186 don’t bite that hard. 190 00:13:32,269 --> 00:13:35,022 If you look at bite forces on a pound for pound basis, 191 00:13:35,105 --> 00:13:37,775 sharks actually bite relatively weakly compared 192 00:13:37,858 --> 00:13:39,610 to other big time predators. 193 00:13:41,612 --> 00:13:45,491 NARRATOR: So how can sharks, apex predators, 194 00:13:45,574 --> 00:13:49,745 with an infamous set of jaws, not be one of the power players 195 00:13:51,539 --> 00:13:53,165 One of the reasons why we think sharks, 196 00:13:53,249 --> 00:13:56,001 pound for pound, don’t have very high bite forces is because 197 00:13:56,085 --> 00:13:57,920 of the shape of their teeth. 198 00:13:59,380 --> 00:14:02,216 NARRATOR: Sharks do something few other animals can 199 00:14:04,468 --> 00:14:06,637 We can see that sharks have lots and lots of teeth. 200 00:14:06,929 --> 00:14:10,516 Any shark is going to have several hundred teeth in its mouth 201 00:14:10,599 --> 00:14:14,979 at any given time and these teeth are continuously moving forward and 202 00:14:15,062 --> 00:14:18,023 replacing teeth that fall out at the front. 203 00:14:18,107 --> 00:14:20,985 So a shark’s mouth is like a conveyor belt of teeth and 204 00:14:21,068 --> 00:14:23,654 a given shark will go through thousands upon thousands 205 00:14:23,737 --> 00:14:25,406 of teeth throughout its lifetime. 206 00:14:28,325 --> 00:14:30,661 NARRATOR: By constantly renewing their teeth, 207 00:14:30,744 --> 00:14:33,080 they never have time to wear down. 208 00:14:35,708 --> 00:14:38,168 Every tooth is razor sharp, 209 00:14:39,837 --> 00:14:43,132 and the sharper the blade the less effort it is to cut. 210 00:14:45,342 --> 00:14:49,471 With 505 pounds of force behind its dagger-like teeth, 211 00:14:49,555 --> 00:14:52,391 this hammerhead, like many other sharks, 212 00:14:52,474 --> 00:14:56,770 has more than enough bite power to hunt prey like rays and squid. 213 00:14:59,356 --> 00:15:01,859 But the team’s mission isn’t over yet. 214 00:15:02,902 --> 00:15:05,529 Next, they want to see how this result compares 215 00:15:05,613 --> 00:15:08,157 with another Bahamas heavyweight. 216 00:15:10,409 --> 00:15:17,166 One with a much tougher meal to swallow. A giant armored sea creature. 217 00:15:19,710 --> 00:15:22,212 But while Brocq and his team reset and prepare for 218 00:15:22,296 --> 00:15:23,631 the next stage of their mission, 219 00:15:25,299 --> 00:15:29,970 off the coast of San Diego, California, another shark super power 220 00:15:30,054 --> 00:15:37,061 is about to be put to the test, in the wild, speed. 221 00:15:40,230 --> 00:15:44,026 Makos, are thought to be the fastest sharks on the planet. 222 00:15:45,527 --> 00:15:50,449 Estimates for their top speed run anywhere from 30 to 70 miles per hour. 223 00:15:52,952 --> 00:15:56,747 But up till now, nobody has managed to get a definitive reading. 224 00:15:59,792 --> 00:16:03,712 And just like bite force, speed stats are crucial 225 00:16:03,796 --> 00:16:05,923 to our understanding of sharks. 226 00:16:06,924 --> 00:16:10,177 They could explain how speed has helped sharks stay 227 00:16:10,260 --> 00:16:12,805 at the top of every ocean food chain. 228 00:16:14,181 --> 00:16:19,061 So today, shark cinematographer Andy Casagrande is taking on 229 00:16:19,144 --> 00:16:21,105 the mako speed test challenge. 230 00:16:23,190 --> 00:16:25,401 ANDY: With the fastest shark in the world you’ve gotta bring 231 00:16:25,484 --> 00:16:27,194 your 'A' game and you gotta be ready. 232 00:16:28,404 --> 00:16:31,824 NARRATOR: With decades of shark filming experience behind him, 233 00:16:31,907 --> 00:16:35,911 Andy’s hoping he can succeed where all others have failed. 234 00:16:38,580 --> 00:16:43,043 But keeping up with a mako at full throttle will test him to the max. 235 00:16:45,754 --> 00:16:49,842 This is science at sea and at speed. 236 00:16:51,593 --> 00:16:53,178 ANDY: Is that where we're heading out there? 237 00:16:53,804 --> 00:16:56,265 NARRATOR: Andy will need all the help he can get. 238 00:16:58,017 --> 00:17:01,103 So he’s teamed up with local boat captain Mark Martin. 239 00:17:04,273 --> 00:17:08,110 ANDY: Well I think we’ve found the spot here. Lots of birds, lots of life. 240 00:17:08,193 --> 00:17:10,070 -MARK: Feels sharky out here. -ANDY: Yeah super sharky. 241 00:17:10,404 --> 00:17:12,281 How fast have you seen a mako shark move? 242 00:17:12,364 --> 00:17:14,783 -I, I couldn’t even tell you, um... -But if you had to guess? 243 00:17:14,867 --> 00:17:17,202 If I had to guess, I’d say well over 40 miles an hour. 244 00:17:17,286 --> 00:17:19,329 -Right. -It sounds like it’s a fisherman's tale, 245 00:17:19,413 --> 00:17:22,082 everyone’s got their, "I’ve seen makos go 70 miles per hour." 246 00:17:22,166 --> 00:17:24,001 -Right. -No one’s ever clocked it on a clock. 247 00:17:25,335 --> 00:17:27,421 NARRATOR: Andy is hoping to change that. 248 00:17:29,131 --> 00:17:31,550 He knows mako sharks better than most. 249 00:17:33,010 --> 00:17:35,387 Something he hopes will give him an advantage. 250 00:17:35,679 --> 00:17:37,639 ANDY: Check it out, we've got a mako right here. 251 00:17:37,723 --> 00:17:41,143 Seems like it’s pretty curious. It’s coming up to my fins. 252 00:17:41,226 --> 00:17:42,936 Whoa yeah, he’s biting my fins! 253 00:17:43,479 --> 00:17:47,357 Uh, looks like my fin, uh, should still work. 254 00:17:49,610 --> 00:17:52,196 ANDY: Mako sharks are in the same family as great whites 255 00:17:52,279 --> 00:17:55,783 and they have that same big shark attitude. 256 00:17:57,951 --> 00:18:01,622 They literally have an avalanche of razor blades which is their mouth, 257 00:18:01,705 --> 00:18:05,626 and if you make a mistake it could be a really, really bad day. 258 00:18:06,919 --> 00:18:11,090 NARRATOR: Andy will be up against a shark with sass and speed. 259 00:18:13,675 --> 00:18:16,637 Makos are built for life in the fast lane. 260 00:18:18,847 --> 00:18:21,600 Their tail provides maximum thrust. 261 00:18:23,644 --> 00:18:26,605 A torpedo shaped body reduces drag. 262 00:18:28,649 --> 00:18:31,735 Their fins are rigid and act as stabilizers. 263 00:18:34,613 --> 00:18:38,408 Even their scales have, "Go faster," ridges 264 00:18:38,659 --> 00:18:41,703 to reduce resistance and maximize speed. 265 00:18:44,414 --> 00:18:47,918 But while mako sharks may have the edge, 266 00:18:48,001 --> 00:18:51,380 all sharks can claim speed as a superpower. 267 00:18:53,006 --> 00:18:55,717 Speed can be a matter of life and death for sharks. 268 00:18:55,801 --> 00:18:57,344 It’s a really important characteristic. 269 00:18:57,427 --> 00:19:01,557 It really determines, are you able to get away from a predator, 270 00:19:01,640 --> 00:19:06,019 are you able to find the prey you need to eat and survive? 271 00:19:07,563 --> 00:19:11,024 NARRATOR: Sharks are fast because their survival depends on it. 272 00:19:12,609 --> 00:19:16,530 But how will Andy keep up with the fastest shark of all? 273 00:19:17,406 --> 00:19:20,909 It’s gonna be tough but I’ve got a few tricks up my sleeve! 274 00:19:30,919 --> 00:19:32,546 NARRATOR: What happens when one of 275 00:19:32,629 --> 00:19:35,841 the world’s most experienced shark cinematographers, 276 00:19:35,924 --> 00:19:39,052 tries to race the world’s fastest shark? 277 00:19:41,096 --> 00:19:45,517 Andy Casagrande is attempting to measure the top speed of a mako 278 00:19:45,601 --> 00:19:48,145 by taking the race to the sky. 279 00:19:50,272 --> 00:19:53,108 Drones are actually the perfect tool for measuring speed. 280 00:19:53,192 --> 00:19:55,819 If we can get this above a mako, we should be able to correlate 281 00:19:55,903 --> 00:19:57,905 the speed of the drone with the speed of the mako. 282 00:19:59,323 --> 00:20:03,202 NARRATOR: Andy’s monitor tells him exactly how fast his drone is flying. 283 00:20:04,036 --> 00:20:08,582 So as long as he can track the mako and keep it inside this square, 284 00:20:08,999 --> 00:20:12,586 he’ll know that the speed of the drone is a perfect match 285 00:20:12,753 --> 00:20:14,046 for the speed of the shark. 286 00:20:15,297 --> 00:20:18,842 And to provide some incentive for the sharks to hit the gas, 287 00:20:18,926 --> 00:20:22,012 they’re using a lure that looks like a fish. 288 00:20:23,263 --> 00:20:25,599 Your job is to get it going as fast as possible. 289 00:20:26,808 --> 00:20:27,768 (drone buzzing) 290 00:20:28,227 --> 00:20:29,728 Three, two, one, go. 291 00:20:36,485 --> 00:20:38,320 Oh let’s get the visual target out! 292 00:20:42,282 --> 00:20:44,743 NARRATOR: The plan sounds simple enough, 293 00:20:44,826 --> 00:20:47,287 but not everyone is convinced it will work. 294 00:20:48,121 --> 00:20:51,708 If someone wanted to chase a mako with a drone that would be really hard. 295 00:20:51,792 --> 00:20:54,503 You need to be able to keep that really fast moving and 296 00:20:54,586 --> 00:20:57,506 efficient shark in the field of view of a camera in a drone. 297 00:20:57,589 --> 00:21:01,176 So that’s going to be a really big challenge in and of itself. 298 00:21:01,260 --> 00:21:03,804 Mako’s are going to swim really fast so they’re going to be out 299 00:21:03,887 --> 00:21:07,349 of your field of view probably within a second. 300 00:21:09,768 --> 00:21:12,896 NARRATOR: Like all sprinters, human and animal, 301 00:21:12,980 --> 00:21:17,943 makos are thought to only reach max speed in short sharp bursts 302 00:21:18,777 --> 00:21:21,446 So these sharks will make for a tricky target. 303 00:21:22,155 --> 00:21:26,034 They’re able to change speed and direction at any moment. 304 00:21:26,868 --> 00:21:29,454 Mako, mako, woo-hoo! 305 00:21:30,163 --> 00:21:31,581 That’s a big shark. 306 00:21:33,458 --> 00:21:34,751 Okay coming in. 307 00:21:36,378 --> 00:21:37,629 Oh let's pull it in. 308 00:21:40,590 --> 00:21:43,552 Oh he’s coming in hot, check it out, woo-hoo! 309 00:21:45,095 --> 00:21:48,056 Ah, it’s just too fast, keeps going out of frame. 310 00:21:51,310 --> 00:21:53,186 MARK: Okay he’s, he’s coming back. 311 00:21:54,187 --> 00:21:55,772 He’s coming up, coming up. 312 00:21:58,233 --> 00:22:03,780 I’m just struggling to track with it. Whoa, ah man! 313 00:22:05,449 --> 00:22:08,827 NARRATOR: To qualify as an accurate result Andy must keep 314 00:22:08,910 --> 00:22:12,998 the mako inside the square for long enough to register a speed reading. 315 00:22:15,125 --> 00:22:18,795 A tough task, even for expert drone pilot Andy. 316 00:22:21,089 --> 00:22:22,215 All right, here we go. 317 00:22:23,842 --> 00:22:26,386 Oh sharks coming right up to the boat, whoa. 318 00:22:27,429 --> 00:22:30,432 That shark just ripped through frame, I just can't keep up with him. 319 00:22:30,891 --> 00:22:34,061 NARRATOR: It’s becoming clear why this has never been done before. 320 00:22:36,188 --> 00:22:37,230 I’m right over the top. 321 00:22:38,231 --> 00:22:40,359 NARRATOR: The makos have the advantage. 322 00:22:41,735 --> 00:22:44,363 They set the pace and direction of this race. 323 00:22:52,829 --> 00:22:56,500 Yeah it’s not working. I can’t maneuver with the mako. 324 00:22:56,708 --> 00:22:59,836 Oh man, just can’t stay with him. 325 00:23:04,674 --> 00:23:07,469 NARRATOR: The makos are living up to their reputation. 326 00:23:09,554 --> 00:23:13,600 But scientists think there’s a very good reason they need to speed. 327 00:23:14,976 --> 00:23:17,479 MARIANNE: Makos eat prey like tunas. 328 00:23:17,562 --> 00:23:20,649 Tunas are among the fastest swimming fish in the ocean and 329 00:23:20,732 --> 00:23:24,986 the shape of a tuna tail is really similar to a Mako’s. 330 00:23:25,695 --> 00:23:29,324 Mako’s have evolved to have a tail shape that helps them be 331 00:23:29,408 --> 00:23:31,618 as fast and efficient as their prey. 332 00:23:32,953 --> 00:23:36,498 NARRATOR: When your food is fast, you need to be faster. 333 00:23:37,958 --> 00:23:41,586 Scientists know that tuna can swim at up to 43 miles per hour 334 00:23:43,672 --> 00:23:47,759 Which suggests makos are capable of even higher speeds. 335 00:23:48,510 --> 00:23:51,263 Possibly upwards of 50 miles per hour. 336 00:23:51,930 --> 00:23:55,142 A speed that in these windy offshore conditions 337 00:23:55,350 --> 00:23:57,894 could prove too much for Andy’s drone. 338 00:24:00,063 --> 00:24:04,860 Time for reinforcements, and an extra dose of adrenaline. 339 00:24:05,402 --> 00:24:06,570 Whoa. 340 00:24:08,613 --> 00:24:12,284 NARRATOR: Joining the team is Jeff Russell and his racer drone. 341 00:24:13,368 --> 00:24:16,663 -99, 101! Whoo! -Oh, my... 342 00:24:16,746 --> 00:24:19,374 Whoa, oh, this is going to be fun. 343 00:24:20,041 --> 00:24:24,296 That is the fastest drone I have ever seen. That’s incredible! 344 00:24:25,130 --> 00:24:28,717 NARRATOR: This drone isn’t just fast, it’s agile. 345 00:24:29,176 --> 00:24:33,889 It may just have the speed and moves they need to maneuver with a mako. 346 00:24:34,181 --> 00:24:35,432 ANDY: Wow! 347 00:24:37,017 --> 00:24:40,645 Dude that thing is incredible. How fast is this? 348 00:24:40,729 --> 00:24:44,107 So this’ll go zero to 80 miles an hour in less than a second. 349 00:24:44,191 --> 00:24:46,109 -What! Are you serious? -Yeah. 350 00:24:46,193 --> 00:24:49,321 And how do you actually know how fast it’s going when you’re flying? 351 00:24:49,404 --> 00:24:53,408 So in the goggles I have a readout that tells me exactly the speed I’m going... 352 00:24:53,492 --> 00:24:55,577 -Okay. -Because of this little GPS here. 353 00:24:55,660 --> 00:24:57,496 It’s all up to you buddy. 354 00:24:57,829 --> 00:25:01,208 All right, here we go! Three, two, one, go! 355 00:25:03,251 --> 00:25:08,423 Whoa! Look at that thing. Look how it flies, like upside down. 356 00:25:11,301 --> 00:25:14,054 NARRATOR: This is the Formula 1 of the drone world. 357 00:25:14,137 --> 00:25:15,680 Unreal. 358 00:25:15,764 --> 00:25:18,475 NARRATOR: But how will it perform against 359 00:25:18,558 --> 00:25:20,519 the Formula 1 of the shark world? 360 00:25:21,686 --> 00:25:23,563 Mark you see anything up there? 361 00:25:23,647 --> 00:25:26,942 We got one coming up this slick here, 200 yards out. Get ready. 362 00:25:29,778 --> 00:25:32,781 -All right, eh, got a shark. -What is it, what is it? 363 00:25:32,864 --> 00:25:35,992 -You got a mako? -Uh, got him, got him yep. 364 00:25:36,076 --> 00:25:39,371 Oh, it’s coming in on the line, looks like it’s coming up to the line. 365 00:25:39,454 --> 00:25:42,791 NARRATOR: Can the racer drone get into position quick enough? 366 00:25:44,042 --> 00:25:47,504 It may be fast and agile, but there’s a price to pay. 367 00:25:48,255 --> 00:25:51,299 Racer drones are not designed for stability 368 00:25:51,967 --> 00:25:56,096 and they’re certainly not designed to track a mako shark. 369 00:25:56,596 --> 00:25:59,099 ANDY: Man, it is hard to fly and pay attention to 370 00:25:59,182 --> 00:26:00,892 the shark at the same time. 371 00:26:03,019 --> 00:26:04,020 NARRATOR: Then suddenly. 372 00:26:04,896 --> 00:26:06,982 (drone buzzing) 373 00:26:10,527 --> 00:26:12,696 Could the race be all over? 374 00:26:19,578 --> 00:26:22,581 NARRATOR: Cinematographer Andy Casagrande has suffered 375 00:26:22,664 --> 00:26:25,333 a setback with his mako shark speed test. 376 00:26:30,130 --> 00:26:32,048 We gotta keep trying man, we gotta keep trying... 377 00:26:32,132 --> 00:26:34,342 I think there’s a reason why no one's ever done this before. 378 00:26:34,843 --> 00:26:37,178 It’s almost impossible. Almost. 379 00:26:38,471 --> 00:26:42,934 NARRATOR: Matching a mako’s speed from the air has proved impossible. 380 00:26:44,894 --> 00:26:47,272 So Andy has come up with a new plan. 381 00:26:48,732 --> 00:26:51,318 Time for a quick physics lesson 382 00:26:52,444 --> 00:26:57,115 If you can’t measure speed, you can calculate it from distance over time. 383 00:26:58,658 --> 00:27:01,828 The whole idea is this, essentially I’ve created a ruler. 384 00:27:01,911 --> 00:27:03,997 Mapped out in one foot increments. 385 00:27:04,080 --> 00:27:07,334 I wanna run this out the back of the boat. That’s going to give us the distance. 386 00:27:08,877 --> 00:27:12,547 NARRATOR: The current will stretch out the 150 foot floating ruler. 387 00:27:14,591 --> 00:27:17,761 Allowing Andy to measure how far the shark swims. 388 00:27:19,054 --> 00:27:22,891 But he still needs to record how long it takes to travel the distance. 389 00:27:24,643 --> 00:27:27,062 So he’ll use the internal clock of a drone, 390 00:27:27,145 --> 00:27:31,524 to both film and time the shark as it swims along the ruler. 391 00:27:33,985 --> 00:27:38,365 The race track is ready but they still need a mako to race along it. 392 00:27:40,784 --> 00:27:44,913 Andy’s plan is to use another drone to pull a lure along the line. 393 00:27:47,040 --> 00:27:50,585 If that sounds complicated, it’s because it is. 394 00:27:51,961 --> 00:27:54,923 -What do you think? -I like it, I think it's kind of a 395 00:27:55,006 --> 00:27:57,634 crazy plan you came up with, but I don’t see why it can’t work. 396 00:27:58,093 --> 00:28:00,804 NARRATOR: Nobody has ever managed to record 397 00:28:00,887 --> 00:28:03,056 the definitive top speed of a mako. 398 00:28:03,598 --> 00:28:08,186 But then nobody has ever created a bespoke mako race track before, 399 00:28:08,520 --> 00:28:11,314 is it genius or madness? 400 00:28:11,439 --> 00:28:14,025 Andy is about to find out. 401 00:28:14,567 --> 00:28:18,321 -All right, Andy here we go, here we go. -What you got one? 402 00:28:18,405 --> 00:28:21,074 -He’s right in front of the buoy. -Yeah. 403 00:28:22,992 --> 00:28:24,244 It’s definitely a mako. 404 00:28:24,661 --> 00:28:26,079 -How big? -Can’t tell the size. 405 00:28:26,538 --> 00:28:28,707 All right, firing the drone up. 406 00:28:30,291 --> 00:28:32,669 -Coming in, still interested? -Still interested, yep. 407 00:28:32,877 --> 00:28:34,796 -All right, we’re all clear. -All clear. 408 00:28:34,879 --> 00:28:38,216 Three, two, one, firing up one, two, three taking off. 409 00:28:39,259 --> 00:28:41,177 All right, you still got eyes on him? 410 00:28:41,261 --> 00:28:43,054 Yeah, why don’t you go just straight back to the buoy 411 00:28:43,138 --> 00:28:44,848 and just wait for him to come right there. 412 00:28:45,140 --> 00:28:47,142 All right, I’m right at the buoy I’m lined up. 413 00:28:47,225 --> 00:28:50,812 Once you get there, drop it in and just run one right down the line. 414 00:28:52,188 --> 00:28:54,733 All right, he’s leaving the buoy go ahead, go ahead, go ahead. 415 00:28:54,816 --> 00:28:56,943 -Oh he’s coming up, he’s coming up. -Go ahead. 416 00:28:59,070 --> 00:29:02,490 -He likes it, keep going he’s behind it. -Yeah. 417 00:29:03,450 --> 00:29:04,993 Hang right there, hang right there. 418 00:29:06,411 --> 00:29:08,955 NARRATOR: The shark needs to be hungry enough to chase 419 00:29:09,122 --> 00:29:10,623 and get the race started. 420 00:29:10,707 --> 00:29:13,168 He’s looking, he's looking. 421 00:29:14,794 --> 00:29:16,838 I just need that burst speed. 422 00:29:16,921 --> 00:29:17,964 -Go, go, go, go... -Go! 423 00:29:18,047 --> 00:29:20,884 -Oh he pulled off of it. -Oh okay I’m going to reset. 424 00:29:20,967 --> 00:29:22,677 -Yeah. -All right, heading back. 425 00:29:25,096 --> 00:29:28,725 NARRATOR: A false start, but Andy is ready to go again. 426 00:29:28,808 --> 00:29:31,936 -All right, I’m reset right there. -Okay. 427 00:29:32,020 --> 00:29:33,688 All right, I'm dropping down. 428 00:29:35,440 --> 00:29:36,816 I got eyes on the shark. 429 00:29:38,860 --> 00:29:40,862 All right, coming towards the boat now. 430 00:29:41,654 --> 00:29:43,156 Okay run the rope, run the rope. 431 00:29:45,784 --> 00:29:48,870 -Coming in, coming in. -Yeah he likes it, he sees it. 432 00:29:48,953 --> 00:29:49,954 NARRATOR: The race is on. 433 00:29:50,038 --> 00:29:51,581 -Go! -I see it, I see it! 434 00:29:55,835 --> 00:29:59,839 NARRATOR: In one quick burst the mako swims right past the ruler 435 00:30:01,174 --> 00:30:02,300 Woo-hoo! 436 00:30:03,593 --> 00:30:06,221 NARRATOR: But was it enough to get a speed reading? 437 00:30:08,807 --> 00:30:10,600 Time for some physics. 438 00:30:14,270 --> 00:30:17,148 Thanks to the floating ruler we know the mako swam 439 00:30:17,232 --> 00:30:21,820 a total distance of 72 feet or 0.01 miles. 440 00:30:24,447 --> 00:30:28,952 And the timer on the camera shows it took just two seconds to do it. 441 00:30:30,787 --> 00:30:34,082 Using the formula: speed is distance over time, 442 00:30:34,791 --> 00:30:38,044 that works out as almost 25 miles per hour. 443 00:30:40,255 --> 00:30:44,342 Almost five times faster than Michael Phelps’s personal best. 444 00:30:45,468 --> 00:30:46,302 Yes! 445 00:30:47,554 --> 00:30:49,973 NARRATOR: But hold the celebrations Andy. 446 00:30:50,306 --> 00:30:53,768 At 25 miles per hour this mako couldn’t catch 447 00:30:53,852 --> 00:30:57,146 a tuna swimming at 43 miles per hour. 448 00:30:57,230 --> 00:31:00,525 This result can’t be their max effort. 449 00:31:01,985 --> 00:31:05,405 Andy’s lure just wasn’t enough to wet their appetite and 450 00:31:05,488 --> 00:31:10,451 get that burst of top speed the makos use to chase down prey. 451 00:31:12,495 --> 00:31:14,831 Now we have a technique so maybe it’s a matter 452 00:31:14,914 --> 00:31:17,625 of come back again and try next year. 453 00:31:17,959 --> 00:31:22,213 Until then the mako shark’s top speed remains unknown 454 00:31:22,297 --> 00:31:24,132 and this time they won the race. 455 00:31:26,175 --> 00:31:28,177 NARRATOR: Attempting to reveal the science behind 456 00:31:28,261 --> 00:31:31,347 the super power comes packed with challenges. 457 00:31:33,474 --> 00:31:36,728 As back in the Bahamas, Brocq is about to discover. 458 00:31:38,146 --> 00:31:42,817 In a test of bite force that will push his shark skills to the limit. 459 00:31:42,901 --> 00:31:44,444 BROCQ (over radio): The tigers are non-stop down here, 460 00:31:44,527 --> 00:31:46,696 it’s a conveyor belt of tigers. 461 00:31:52,160 --> 00:31:54,162 NARRATOR: Tiger sharks are one of 462 00:31:54,245 --> 00:31:56,873 the largest predatory sharks on the planet. 463 00:32:02,462 --> 00:32:05,214 They feed off an extensive menu, 464 00:32:06,883 --> 00:32:10,386 whales, birds, even other sharks. 465 00:32:12,138 --> 00:32:15,934 But there’s one delicacy that takes more effort than others, 466 00:32:18,645 --> 00:32:20,104 sea turtles. 467 00:32:23,191 --> 00:32:27,987 So how much jaw power does it take to crunch through their tough shells? 468 00:32:32,408 --> 00:32:36,496 Here in the Bahamas, Brocq and the team are about to find out. 469 00:32:37,830 --> 00:32:41,668 Facing up to the jaws of a tiger shark, is strictly for pros. 470 00:32:44,337 --> 00:32:47,715 Brocq has spent almost two decades diving with these sharks. 471 00:32:50,927 --> 00:32:54,806 He knows the best way to stay safe is to take things slow. 472 00:32:58,142 --> 00:32:59,686 This first dive, we’re going to go down, 473 00:32:59,769 --> 00:33:01,813 we’re not going to bring the bite force gauge, 474 00:33:01,896 --> 00:33:04,107 we’re just going to see what tigers are here, 475 00:33:04,190 --> 00:33:06,234 come back up and we’ll get some more back up support, 476 00:33:06,317 --> 00:33:09,320 in terms of safety and we’ll grab the bite force gauge. 477 00:33:09,862 --> 00:33:12,198 What could go wrong? (sarcastic laughs) 478 00:33:15,410 --> 00:33:18,162 NARRATOR: This area is known as Tiger Beach, 479 00:33:18,705 --> 00:33:20,873 and it quickly lives up to its name 480 00:33:22,709 --> 00:33:25,837 These tiger sharks are used to diver interactions. 481 00:33:32,135 --> 00:33:36,389 They’re not shy, Brocq will need to stand his ground. 482 00:33:37,932 --> 00:33:40,560 BROCQ: There’s two tigers, coming right on me, right now. 483 00:33:41,894 --> 00:33:44,105 NARRATOR: The sharks know where the food is kept. 484 00:33:48,317 --> 00:33:49,986 Little snack for my girl. 485 00:33:53,781 --> 00:33:57,618 NARRATOR: It doesn’t take long for other sharks to sniff out a free meal, 486 00:33:59,537 --> 00:34:01,247 and nobody is waiting in line. 487 00:34:02,040 --> 00:34:05,710 Ah, they won’t even let me get set. 488 00:34:09,422 --> 00:34:11,257 Oh, look at how big she is. 489 00:34:16,137 --> 00:34:18,681 She’s kind of eating the drum. Oh! 490 00:34:20,308 --> 00:34:22,101 NARRATOR: If ever a scene needed a, 491 00:34:22,185 --> 00:34:24,562 “Don't try this at home!” Warning. 492 00:34:24,687 --> 00:34:26,022 This is it. 493 00:34:32,528 --> 00:34:37,116 Brocq manages the situation by guiding the sharks away from the bait, 494 00:34:37,533 --> 00:34:39,452 to help them settle and relax. 495 00:34:42,163 --> 00:34:45,083 But it’s not the easy trial run Brocq had hoped for. 496 00:34:45,750 --> 00:34:47,168 (groans) 497 00:34:49,170 --> 00:34:51,339 BROCQ: New tiger just arrived. 498 00:34:51,798 --> 00:34:53,841 There’s three tigers on the drum right now. 499 00:34:54,509 --> 00:34:58,137 The tigers are non-stop down here. It’s a conveyor belt of tigers. 500 00:34:59,180 --> 00:35:03,309 NARRATOR: The more sharks, the more they compete for Brocq’s attention. 501 00:35:04,060 --> 00:35:09,690 Four tigers right here. Tiger on tiger on tiger. 502 00:35:10,233 --> 00:35:11,734 These tigers don’t like to wait their turn, 503 00:35:11,818 --> 00:35:14,612 so a lot of the times you’ll get four coming in at once, 504 00:35:14,695 --> 00:35:17,865 and you don’t even have enough arms to keep ‘em all off of you. 505 00:35:18,908 --> 00:35:22,203 NARRATOR: Brocq has an underwater safety team at his side, 506 00:35:22,286 --> 00:35:24,705 but with this many sharks around 507 00:35:25,414 --> 00:35:28,126 staying in control is still a tough job. 508 00:35:28,751 --> 00:35:30,795 It's getting kinda crazy down here. 509 00:35:32,964 --> 00:35:34,882 I think we should move. 510 00:35:36,968 --> 00:35:39,804 NARRATOR: By taking the food into a more open area, 511 00:35:39,887 --> 00:35:44,183 there’s more time to see where the sharks are approaching from and react. 512 00:35:52,859 --> 00:35:56,779 All right, guys we got quite a few tigers now, they’re feeding quite nicely. 513 00:35:57,572 --> 00:35:59,824 I think we give the bite force gauge a go. 514 00:36:02,869 --> 00:36:04,120 All righty, thank you. 515 00:36:09,000 --> 00:36:13,171 NARRATOR: If these sharks can crunch through a turtle shell, 516 00:36:13,254 --> 00:36:15,715 what will they do to the bite force gauge? 517 00:36:21,846 --> 00:36:24,473 All right, I’m gonna try to give them the bite force gauge. 518 00:36:24,932 --> 00:36:25,892 Coming in. 519 00:36:26,893 --> 00:36:30,146 -All right, stand by. -Copy Brocq. 520 00:36:32,857 --> 00:36:34,442 (groans) 521 00:36:35,234 --> 00:36:37,612 Yeah she didn't really, she just kinda gummed it. 522 00:36:38,279 --> 00:36:39,488 Did you get a reading? 523 00:36:39,572 --> 00:36:42,158 Negative Brocq did not get a reading. 524 00:36:43,075 --> 00:36:46,245 Okay, here we go. Coming in, stand by. 525 00:36:50,124 --> 00:36:51,500 (grunts) 526 00:36:52,752 --> 00:36:54,253 That didn’t work. 527 00:36:55,379 --> 00:36:57,381 All right, I’ve got enough air for one more time. 528 00:36:58,090 --> 00:36:59,800 Here we go, I'm try it again. 529 00:36:59,884 --> 00:37:03,221 She’s turning, she's turning, she’s lining me up, stand by. 530 00:37:08,142 --> 00:37:09,310 Oh bite. 531 00:37:12,980 --> 00:37:15,650 NARRATOR: Looks promising, until... 532 00:37:15,733 --> 00:37:16,984 Bah, bah, bah, bah, bah! 533 00:37:17,068 --> 00:37:19,195 NARRATOR: A lemon shark gets in the way. 534 00:37:21,364 --> 00:37:22,823 (thuds) 535 00:37:22,907 --> 00:37:26,661 Ah, cable got severed by a lemon! 536 00:37:33,960 --> 00:37:37,171 NARRATOR: In the Bahamas, the bite force gauge is broken 537 00:37:37,255 --> 00:37:38,839 before they even got a reading. 538 00:37:40,716 --> 00:37:43,386 BROCQ (over radio): A lemon got the cable in its mouth, 539 00:37:43,469 --> 00:37:45,429 and the cable is cut. 540 00:37:50,559 --> 00:37:54,021 NARRATOR: It’s a setback but shark expert and cinematographer Brocq 541 00:37:54,105 --> 00:37:56,774 thinks the wires can be re-connected. 542 00:37:57,233 --> 00:37:59,735 As you can see here, I've been fixing this up. 543 00:37:59,819 --> 00:38:01,612 A lemon shark came in... 544 00:38:04,615 --> 00:38:07,326 And it just got caught on one of his little teeth, 545 00:38:07,410 --> 00:38:09,328 cut the cable right in two. 546 00:38:11,163 --> 00:38:13,207 So we’re going to go back down and try and get some more readings. 547 00:38:20,298 --> 00:38:24,218 NARRATOR: They’re still missing that elusive first bite force reading, 548 00:38:24,302 --> 00:38:26,887 from one of the huge tiger sharks down here. 549 00:38:28,973 --> 00:38:32,727 Will the patched up wires hold long enough for them to get a bite? 550 00:38:35,438 --> 00:38:37,648 Three tigers here now. 551 00:38:41,819 --> 00:38:43,112 Shark coming in, shark coming in. 552 00:38:47,575 --> 00:38:49,076 He’s biting it! 553 00:38:52,413 --> 00:38:55,249 How was your reading on that one? It was a good bite. 554 00:38:55,333 --> 00:38:59,086 Copy Brocq, we read 449.5, that was an awesome bite! 555 00:38:59,462 --> 00:39:01,005 (cheerful shout) 556 00:39:02,340 --> 00:39:04,216 NARRATOR: Not a bad first bite, 557 00:39:04,300 --> 00:39:07,845 but Brocq thinks these turtle hunters are capable of more, 558 00:39:07,928 --> 00:39:09,764 so he keeps going. 559 00:39:11,265 --> 00:39:13,017 But with a weakened wire, 560 00:39:13,100 --> 00:39:16,520 he has to be extra careful the tigers don’t snag it, 561 00:39:17,897 --> 00:39:19,899 and they’re coming in thick and fast. 562 00:39:22,777 --> 00:39:23,819 It’s going off down here. 563 00:39:25,279 --> 00:39:28,282 We’ve got four or five now I think, non-stop. 564 00:39:31,077 --> 00:39:33,996 Big, big, big, big, big, big, big, big mommas. 565 00:39:36,290 --> 00:39:37,708 There’s two coming in. 566 00:39:38,459 --> 00:39:41,670 All right, stand by. Bite time. 567 00:39:45,883 --> 00:39:47,426 Nice bite there. 568 00:39:47,510 --> 00:39:54,350 Oh, that’s definitely a bite, three, four, 500, 520, 549.5. 569 00:39:54,433 --> 00:39:55,684 Wow, that’s cool. 570 00:39:56,185 --> 00:39:59,814 NARRATOR: For anything unlucky enough to end up between this set of jaws, 571 00:39:59,897 --> 00:40:03,526 that’s like being crushed by the weight of a motorcycle. 572 00:40:03,776 --> 00:40:05,528 Stand by Lil, stand by. 573 00:40:07,113 --> 00:40:10,908 Here she comes, coming in, coming in. Oh, these girls are big. 574 00:40:12,743 --> 00:40:14,453 Ah, we got a nice bite. 575 00:40:17,164 --> 00:40:19,166 That was a proper solid one we just had now. 576 00:40:19,917 --> 00:40:23,546 -Did you get a reading there? -We got a recording of over 600. 577 00:40:25,172 --> 00:40:28,300 NARRATOR: A bite that’s like being crushed by a vending machine. 578 00:40:29,552 --> 00:40:31,595 It’s the highest result so far. 579 00:40:32,680 --> 00:40:37,184 He’s on a roll, and sets his sights on the biggest shark of the group. 580 00:40:38,227 --> 00:40:41,981 He is a monster. Coming in for a bite. 581 00:40:45,025 --> 00:40:46,277 Ah, it’s a good bite. 582 00:40:52,032 --> 00:40:53,325 Did you guys get any reading then? 583 00:40:53,909 --> 00:40:58,956 Brocq we actually got reading of 864 on that last bite. 584 00:40:59,248 --> 00:41:01,584 (laughs) 585 00:41:06,213 --> 00:41:07,089 Wa-hoo. 586 00:41:10,968 --> 00:41:16,307 NARRATOR: This nine foot tiger shark bit down with 864 pounds of force. 587 00:41:16,849 --> 00:41:19,768 That’s about the same weight as a grand piano. 588 00:41:21,187 --> 00:41:25,232 It’s the first known bite reading from a tiger shark in the wild. 589 00:41:25,691 --> 00:41:27,234 A huge achievement. 590 00:41:27,943 --> 00:41:29,487 It doesn't get much better than this. 591 00:41:30,446 --> 00:41:33,324 NARRATOR: But there’s something surprising about the team’s results. 592 00:41:35,075 --> 00:41:37,828 The hammerhead they tested measured 11 feet, 593 00:41:39,830 --> 00:41:42,875 and delivered 505 pounds of bite power. 594 00:41:45,127 --> 00:41:47,588 The tiger shark was nine feet in length. 595 00:41:49,715 --> 00:41:55,971 But at 864 pounds its bite was 70% more powerful than the hammerhead’s, 596 00:41:57,765 --> 00:41:59,725 despite being two feet shorter. 597 00:42:01,352 --> 00:42:04,188 What could explain such a difference in bite force? 598 00:42:07,983 --> 00:42:11,820 Scientists think that jaw power isn’t just about size. 599 00:42:12,696 --> 00:42:15,407 While big sharks certainly pack a punch, 600 00:42:15,699 --> 00:42:18,869 bite force comes down to several other factors. 601 00:42:20,120 --> 00:42:22,289 One of them is diet. 602 00:42:24,917 --> 00:42:28,045 Tiger sharks feed on sea turtles. 603 00:42:28,754 --> 00:42:33,801 A meal that takes raw power and killer technique. 604 00:42:34,802 --> 00:42:36,345 DAN: Tiger sharks are a great example 605 00:42:36,428 --> 00:42:40,057 of how the anatomy of an animal but also its behavior come into play. 606 00:42:41,058 --> 00:42:43,727 NARRATOR: These sharks not only have a wider jaw, 607 00:42:43,811 --> 00:42:46,855 and grippier teeth to wrap around the turtle’s shell, 608 00:42:48,732 --> 00:42:51,944 they’ve evolved a bite technique to break through it. 609 00:42:53,153 --> 00:42:55,406 DAN: Tiger sharks shake their head back and forth 610 00:42:55,489 --> 00:42:59,076 and back and forth, from right to left, to use the teeth like a saw. 611 00:43:00,452 --> 00:43:03,163 NARRATOR: Dinner does not come easy for these sharks. 612 00:43:05,541 --> 00:43:08,961 Whereas hammerheads have a more simple grab and go approach. 613 00:43:11,046 --> 00:43:15,676 And this, “One quick bite,” strategy takes a lot less power 614 00:43:16,885 --> 00:43:18,929 and a smaller set of jaws. 615 00:43:21,098 --> 00:43:25,227 Behavior that could explain why the smaller tiger shark recorded 616 00:43:25,311 --> 00:43:27,521 a stronger bite than the bigger hammerhead. 617 00:43:32,401 --> 00:43:34,945 DAN: Studying bite force is a really useful way to understand 618 00:43:35,029 --> 00:43:37,656 the relationship between how animals are built 619 00:43:37,740 --> 00:43:39,617 and what they do in the environment, 620 00:43:39,700 --> 00:43:43,621 and these are relationships that evolve over enormous scales of time. 621 00:43:43,704 --> 00:43:46,457 So bite force helps us understand why sharks have been 622 00:43:46,540 --> 00:43:48,751 such dominant predators for a long time. 623 00:43:48,834 --> 00:43:51,754 NARRATOR: Bite force and speed are the skills that have 624 00:43:51,837 --> 00:43:55,466 helped sharks rule almost every ocean, and, 625 00:43:55,549 --> 00:43:58,969 by putting them to the test, scientists are discovering that 626 00:43:59,053 --> 00:44:03,265 the greatest superpower of all could be adaptability. 627 00:44:04,850 --> 00:44:07,978 The ultimate evolutionary survival skill.