Latest articles by Julio Lacerda

380-million-year-old fossilized forests help to tell a story about ancient climate change.

With faces pretty enough to turn you to stone, and a pair of saber-teeth to slash at their prey, the gorgonopsians truly lived up to their frightful name. They were the lords of the Late Permian, a time when every single continent was beginning to drift together, forming the supercontinent of Pangaea.

Ophiacodon was a reptile-like cousin of mammals that lived around 300 million years ago, but surprisingly an analysis of its bones indicates that it was already warm-blooded long before true mammals evolved.