You've got a new brown spot on your face, but is it a freckle or a sunspot? Or perhaps you've found a spot on your back that ...

In fact, some experts think that this just means the cluster of skin cells that make up the mole is simply sitting on an area ...

Humans evolved to our current body size relatively rapidly ... Understanding how species naturally evolve cancer defenses has important implications for human medicine. The naked mole rat, for example ...