Human hair and fingernails continue to grow after death.
7
By weight, Bone is five times stronger than steel.
417
The human brain is more active during sleep than during the day.
28
The world's shortest man measures only 21.5 inches.
73
The average sperm cell swims at 8 inches per hour.
4
Tigers can see 6 times better at night than humans.
305
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
