(Dawid Adam Iurino/PaleoFactory/Sapienza University of Rome) For the first 280 million years of animal life on Earth, ...

This video looks at the deadliest disasters in human and planetary history, from famines and plagues to asteroid impacts, ...

Some of the most massive and influential stars in the universe are OB stars. These blue giants, many times more massive than ...

The resulting extinction decimated animal groups, like archaeocyathids (reef-building marine sponges) and hyoliths (animals with small conical shells). "It's unusual to point to a tectonic cause for ...

Add Yahoo as a preferred source to see more of our stories on Google. Even bivalves looked different during the time of the dinosaurs, as these fossils of an ultra-fortified oyster, left, and armored ...

A mass extinction event is a term used to describe a large-scale event that wipes out species. It is usually not a short, one-time incident but rather something that occurs over thousands or millions ...

couple of Brachiosaurus altithorax and a flock of Pterosaurs in a scenic Late Jurassic landscape© dottedhippo/iStock via Getty Images The Jurassic Period is one of the three prehistoric geological ...

It struck the seas off the coast of Mexico's Yucatán Peninsula with the force of billions of atomic bombs, carving out the 112-mile-wide Chicxulub crater. The asteroid vaporized almost instantly.

Shortly after an asteroid slammed into Earth 66 million years ago, life for non-avian dinosaurs ended, but the evolutionary story for the early ancestors of birds began. The fossil record tells us ...