After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
A human being loses an average of 40 to 100 strands of hair a day.
133
Enamel is hardest substance in the human body.
61
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
We share 70% of our DNA with a slug.
218