Riley Black’s new book, When the Earth was Green, uses the latest research to envision the ancient worlds of our favorite prehistoric animals.

Plants and animals need health lands and waters to live on the Colorado Plateau. Here's what we're doing to help beaver, ...

This observation is explained by another key feature of stem cells that is shared between plants and animals, as explained below. The ability of stem cells to constantly generate new tissues has ...

THIS little book meets a real want ... and reasoning upon problems connected with variation. Variation in Animals and Plants. By H. M. Vernon The International Scientific Series.