New research shows how the Greenland shark’s heart keeps working for centuries by tolerating aging rather than avoiding it.

1. Introducing sharks, skates, rays, and chimaeras -- What are sharks and how are they classified -- How many kinds of sharks are there -- How did sharks get their name -- Where do shards live -- When ...

Blind as a bat. See like a hawk. Eagle-eyed…Eyes like a shark? As humans, we’ve long been fascinated by the capabilities, or lack thereof, of creatures throughout the animal kingdom. While some ...