For most of our evolutionary history, human activity has been linked to daylight. Technology has liberated us from these ancient sleep-wake cycles, but there is evidence sunlight has left and ...

That mirror you look into every morning is revealing more about your pain tolerance than you ever imagined. The same genes that determine whether you have brown, blue, green, or hazel eyes are also ...

Advances in cosmetic science have given us more control over our looks than ever; we can now change the size and shape of certain body parts, make smile lines less noticeable, and even spot-remove fat ...