David Schwimmer discovers why 400 whale sharks gather off the coast of Mexico, kind of like Woodstock but for sharks. From a meteorite hurtling through space, to a world of monsters and alien life forms, uncover the mysteries of these Caribbean giants.

Join David Schwimmer, pretend naturalist, in the Ethiopian Highlands, home to animals found nowhere else on Earth. In this high-altitude realm, geological forces create and destroy, and survival depends on sticking together and dominating your rivals.