Andy Casagrande

Two teams of experts go to extraordinary lengths to take shark science into the wild as they investigate two of the most iconic shark superpowers - speed and bite force. In California the race is on as Andy Casagrande attempts to ...

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.