The face of a 1,400-year-old murder victim is seeing the light of day, now that scientists have digitally reconstructed his features. CT scans of "Lucy," a human ancestor that lived 3 million years ...

Simply put, your body can't turn fat into muscle. And the reverse is also true: Your body can't turn muscle into fat, either. Here's why. By analyzing what's left of an ice age grave site, researchers ...