Meet the tiny, super rare pocket shark whose 'pocket' remains a mystery to scientists

Since the first one was spotted nearly four decades ago off the coast of Peru, only two pocket sharks, teensy sharks with a tiny pocket above each fin on the side of their body, have ever been found.

NOAA biologist Mark Grace found the second one, a young male, recently by accident of the coast of the Gulf of Mexico. Since then, the two of them have been traveling the globe so researchers from all over can see and study the rare shark.

We paid a visit to New York's American Museum of Natural History, where the shark is being studied, last week to get an up-close-and-personal look.