Underwater Killer

Could Einstein's excessive feats of concentration indicate autism?

A daring National Geographic scientist gets pulled out of his boat as he tries to measure the biteforce of a giant crocodile.

Recife, one of Brazil's top tourist destinations, has the highest concentration of shark attacks in the world.

Brady heads into the bush and measures each animals' power, and witnesses firsthand the differences in their methods of attack.

With bad weather approaching, the Costa Serena crew endure a tricky honeymoon season on one of the worlds biggest ships.