'Terror beast' fossils unearthed in Greenland are more than half a billion years old

A reconstruction of the pelagic ecosystem and the organisms fossilised in Sirius Passet, revealing how Timorebestia was one of the largest predators in the water column more than 518 million years ago.

A "terror beast" marine worm with a giant jaw dominated the seas more than 500 million years ago, exquisitely preserved fossils show.

Scientists recently uncovered the fossils of the newfound species of carnivorous worm — named Timorebestia koprii, or "terror beast" — in northern Greenland and described it in a study published Wednesday (Jan. 3) in the journal Science Advances.