The IUCN warns that climate change is affecting more than half (52%) of Europe's fragile butterfly species, and the severely ...

Arizonasaurus was an archosaur from the Middle Triassic.

Mass extinctions, volcanism, and impacts: The geological extinction record : history, data, biases, and testing / Norman MacLeod -- Large igneous provinces and mass extinctions : an update / David P.G ...

This global analysis shows that the biodiversity impact of producing 1 kg of food can vary by up to 1,000-fold, with ruminant ...

One of the most intriguing and intricate mysteries in paleontology is the disappearance of North America's giant mammals, or megafauna, which included saber-toothed cats, mastodons, and mammoths, some ...

(CNN) — Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” ...

(CNN) — Humans have wiped out more than 100 species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass ...