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6.6 / 10
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41 Minutes
Dr. Tristan Guttridge believes hammerhead sharks can reach monster sizes by hunting other sharks -- but the only way to prove it is to get tissue samples from some of the largest sharks on the planet.
2004
7.5 / 10
2012
6.7 / 10
2021
6.0 / 10
2021
6.5 / 10