Did fist fighting change the course of human evolution?

The human hand is a beautiful product of evolution. Each one a finely crafted arrangement of 27 bones, our hands are among the most dexterous in the animal kingdom, and are every bit as capable of threading a needle as they are grasping the oar of a canoe. But newly published findings suggest our palms and fingers may… » 12/20/12 1:20pm 12/20/12 1:20pm

How a three-fingered hand "regrew" its digits after amputation

A woman was born with what's known as a phocomelic hand, meaning she was missing a finger and thumb on one of her hands. But when that hand was amputated after a car accident, she developed a five-fingered phantom hand. » 8/12/12 3:15pm 8/12/12 3:15pm

Is the Mars Ocean Hypothesis all wet?

Evidence of Mars' watery past continues to pile up, but details surrounding the extent and duration of the planet's hydrous history remain muddled — just how wet was Mars, really? » 4/11/12 7:30am 4/11/12 7:30am