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

Massive volcanic eruptions on the Indian peninsula have long been proposed as an alternative cause for the demise of the dinosaurs. This phase of active volcanism took place in a period just before ...

Many of their descendants—modern birds—are currently threatened by extinction, with hundreds of species at risk due to human activity. This article explores the major extinction events that influenced ...

Violent supernovas may have caused two of Earth’s largest mass extinctions that have never been completely explained, according to a theory put forward in new research.During the final stages of a ...

Everyone knows that dinosaurs are extinct, and most people have some idea about how it might have occurred. But the exact periods in history when it happened are less well known. Was it a single ...

A meteorite hit Earth about 66 million years ago near what today is the Yucatán peninsula, causing widespread destruction and death. But almost simultaneously, intense volcanism covered a vast area of ...

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 ...

(CNN) — A cataclysm engulfed the planet some 252 million years ago, wiping out more than 90% of all life. Known as the Great Dying, the mass extinction that ended the Permian geological period was the ...

Massive volcanic eruptions on the Indian peninsula have long been proposed as an alternative cause for the demise of the dinosaurs. This phase of active volcanism took place in a period just before ...