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

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.

A space weather expert has issued a dire warning that Earth may be on the brink of a catastrophic geomagnetic disaster capable of wiping out up to 90 percent of humanity. Ben Davidson, founder of ...

Add Yahoo as a preferred source to see more of our stories on Google. A skeleton of a Dodo. - Kirsty Wigglesworth/AP Humans have wiped out hundreds of species — with many more on the brink or ...

Stay calm, doomsday preppers. We (probably) won’t be around to see it.

Mass extinction events are defined by a 75% loss in total species. These events can take tens of thousands to several million years. Experts are alarmed at today’s “unprecedented” population abundance ...

Scientists are increasingly worried we may be witnessing the start of the “sixth mass extinction” – the first to be caused by human activities. Five earlier mass extinctions, caused by dramatic but ...

The discovery of a 245-million-year-old marine reptile with preserved internal organs is giving scientists a rare window into ...

This is the conclusion of Daniel H. Rothman, a Professor of Geophysics in the Department of Earth, Atmospheric, and Planetary Sciences at the Massachusetts Institute of Technology in Cambridge, MA. He ...

About 445 million years ago, Earth's oceans turned into a danger zone. Glaciers spread across the supercontinent Gondwana, and shallow seas shrank fast. Ocean chemistry also shifted hard. In what ...

Mass extinction : a general view / Ashraf M.T. Elewa -- Late Ordovician mass extinction / Ashraf M.T. Elewa -- The end Ordovician : an ice age in the middle of a greenhouse / Curtis R. Congreve -- ...