An elusive creature of the deep can live for centuries. Scientists think they know why

This week, learn why Greenland sharks can live for centuries, discover when Neanderthals and humans met, see the most volcanic world in our solar system, and more.

​ This week, learn why Greenland sharks can live for centuries, discover when Neanderthals and humans met, see the most volcanic world in our solar system, and more. Read More Breaking News, Latest News and Videos | CNN