Around 252 million years ago, Earth went through its most devastating extinction event, the Permian–Triassic Mass Extinction ...

Over the past two decades, more than one-fifth of the world's oceans, an area exceeding 75 million square kilometers, have ...

Its structure is so effective that scientists are now mimicking it in synthetic materials for filters, electronics, and ...

This artist's conception depicts ordinary matter in the warm, thin gas making up the intergalactic medium (IGM)—which has ...