Women with blue eyes should not be any different from those with green or brown eyes. Yet preference for blue eyes seems both universal and undeniable—in males as well as females. One explanation is that the human pupil dilates when an individual is exposed to something that she likes. For instance, the pupils of women and infants (but not men) spontaneously dilate when they see babies. Pupil dilation is an honest indicator of interest and attraction. And the size of the pupil is easiest to determine in blue eyes. Blue-eyed people are considered attractive as potential mates because it is easiest to determine whether they are interested in us or not.

Does picking up food from the floor five seconds after you drop it really affect the cleanliness of the food? Yes and no.

Anybody know what's in this stuff anyway?

Researchers at the University of Kentucky are perfecting a skin cream that stimulates the body's own tan-generating cells, producing the same bronzed results as a natural tan without the sun exposure.

Research shows that 20 percent of people will die from cardiac or respiratory failure. How's your heart?

New research shows that even our best drugs probably won't kill bird flu.

Men's Health tells you how to eliminate backaches through regular stretching and exercise.