By Will Dunham Feb 10 (Reuters) - Scientists have unearthed in Canada's province of Nova Scotia the skull of a creature dating to about 307 million years ago that is one of the oldest-known ...

“This is one of the oldest known four-legged animals to eat its veggies,” said Arjan Mann of the Field Museum in Chicago, a co-lead author of the study. “It shows that experimentation with herbivory ...

Life began in the sea, and it took a long time to move onto land. Plants started creeping ashore about 475 million years ago.

Dominated by carbon-rich swamps and forests proliferating across Earth's rocky surface, the Carboniferous period saw a boost in atmospheric oxygen and vast quantities of carbon dioxide trapped in what ...