The oldest leech ever discovered has turned out to be a shape shifter of expectations, preserving a body plan that looks ...

The oldest fossils ever found are "direct evidence" of life on Earth 3.8 to 4.3 billion years ago when our planet was still in its infancy, researchers reported Wednesday. Even at the lower end of the ...

NEW YORK — A big catch of fish fossils in southern China includes the oldest teeth ever found — and may help scientists learn how our aquatic ancestors got their bite. The finds offer new clues about ...

Jellyfish are one of the oldest types of creatures to ever roam around the Earth. And recently in a fossil-rich area of the ...

A "hook-toothed" reptile that lived in the Scottish Highlands around 167 million years ago fed on early mammals and young dinosaurs, say scientists. The Jurassic predator - one of the oldest fossil ...

New analyses have overturned a long-taught chapter of Japanese prehistory: fossils from a Toyohashi quarry once hailed as the ...

A 430-million-year-old fossil reveals that the first leeches were ocean predators, not bloodsuckers. The discovery radically shifts the timeline of leech evolution by more than 200 million years.