Earth's largest mass extinction occurred about 252 million years ago, wiping out the majority of marine and terrestrial life, ...

Upwelling of deep water rich in phosphorus supports an N-fixing symbiont that lives on Sargassum algae, giving the algae a competitive advantage. By early June of this year, roughly 38 million tons of ...

An international investigation uncovers how criminal networks traffick parts of the totoaba, an endangered fish caught in ...