Researchers discovered a 520-million-year-old fossil of an arthropod named Youti yuanshi that still had its brain and guts ...

Chemical fossils from 635-million-year-old rocks suggest sponges were among Earth’s first animals, reshaping the story of early life.

Sometime before 520 million years ago, animal life began to flourish as never before. The small shells, worms and even sponge ...

Long before the Grand Canyon became a hotspot for tourism, it was a hub of ancient animal activity. All kinds of marine animals lived in the area back when it was submerged in the ocean during the ...

The deposit contains more than 50 unknown species from the Cambrian Explosion. This is an Inside Science story. (Inside Science) -- A new trove of outstandingly preserved fossils in China from the ...

(CNN) — Paleontologists have discovered remarkable fossils in the Grand Canyon that reveal fresh details about the emergence of complex life half a billion years ago. The newfound remains of fauna ...

Scientists are chipping away at a century-old mystery. Charles Darwin at his home at Down House, Kent, 1880. Heritage Images/Getty Images — -- Scientists following two different lines of evidence ...