The frilled shark is one of the oldest and strangest predators still alive, surviving in deep ocean waters with a body plan that has barely changed for tens of millions of years . Its eel-like body, ...

Cow sharks (one shown) and frilled sharks are members of the newly proposed lineage. Tahsin Ceylan / Anadolu via Getty Images The shark family tree might be more complicated than previously thought.

Despite multiple mass extinctions, the frilled shark has managed to thrive for 100 million years. Today, it remains one of evolution’s most haunting survivors. Long before forests reshaped Earth’s ...