In ancient China, spring rains were called "as precious as oil" for their vital role in nature's spring revival. Today, a ...

North America has had a longer history of flying squirrels than any other part of the world. The first known specimens date back to the Late Eocene era (56 to 33.9 million years ago). They then ...

The Atlantic Ocean had not fully opened, and animals, including perhaps our primate ancestors, could walk from Asia through Europe and across Greenland to North America. They wouldn't have ...

E. D. Cope, struck by the remarkable fact that the molar teeth, both upper and lower, of all the mammals from the Puerco or lowest Eocene horizon of North America carry three cusps arranged in ...