The earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. Emma Bernard, a curator of fossil fish at the Museum, ...

Greenland sharks are thought to have lifespans that can reach 400 years. Building upon previous work, University of Tokyo-led ...

which are cousins of modern sharks with comb-like barbs on their spines that are used for defense purposes. Ctenacanths first appeared in the fossil record about 380 million years ago and had ...

The first sharks on Earth: Ancient relatives of sharks first appeared in the world's oceans about 400 million years ago. Today, sharks are classified among the elasmobranchs, which also includes ...

A closer look at what defines a shark. Sharks and rays come from one big family that evolved over 400 million years ago. Today they come in a variety of shapes and sizes. But with 510 species of ...

Sharks have been on Earth for over 400 million years, much longer than humans, so we're the ones who are invading their space." As keystone species in the oceans, sharks play a vital role in ...

Between 23 million and 3.6 million years ago, megalodon ... The secret of how Greenland sharks can live cancer-free for 400 years ...