New research confirms that eyes truly are the window to the soul, with eye-widening or squinting serving as the primary clue observers use to decode someone's emotional state. The findings suggest facial expressions originated as survival mechanisms. Only later were they co-opted as social cues.
Domestic extremists in the U.S. are older, better educated, more affluent, more religious and more likely to be white than street gang members are, according to the first comprehensive study to compare the two groups.
A new study shows for the first time that some human cells with DNA damage are passed to offspring cells without repairing them, essentially kicking the can down the road. The study has implications for both cancer and aging.