Deep in the cold waters of the North Atlantic, there’s a massive, slow-moving shark that holds an incredible secret—this creature can live for as long as 400 years! It’s called the Greenland shark, and scientists believe it might just be one of the longest-living animals on Earth. In fact, some of these sharks could have been swimming through the oceans when Shakespeare was still writing plays.

These sharks don’t even reach sexual maturity until they’re around 150 years old, meaning thei...