Frozen Testicular Tissue Can Be Reimplanted After 20 Years and Go On To Make Viable Sperm

Bali-like temperatures in Wyoming? Fossils reveal tropically hot North America 95 million years ago

Why human brains were bigger 3,000 years ago. Our modern civilisation may be the most advanced to ever exist on Earth, but around 100 generations ago, our ancestors had brains that were larger than our own.

Earth has nearly 50 percent chance of hitting key warming threshold in the next five years, report says