A hard working adult sweats up to 4 gallons per day.
39
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119
Identical twins do not have identical fingerprints.
79
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
-86
Men are more attracted to women whose bone structure is similar to their own mothers. It's called "sexual imprinting".
18