A 500,000-year-old elephant bone tool discovered in southern England is changing the way scientists understand early human ...

The objects suggest that humans entered South America thousands of years earlier than previously thought.

For years doctors advised women against hormone therapy for women in the menopausal transition. Now everyone's talking about ...

Nima Salari, MD, is not opposed to spinal fusion. He is opposed to making it the starting point. Before immobilizing a segment of the spine, the spine surgeon at Phoenix-based Desert Institute for ...