If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The average sperm cell swims at 8 inches per hour.
4
Every human spent about half an hour as a single cell.
144
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Poor eyesight (myopia) is associated with higher IQ.
232
By weight, Bone is five times stronger than steel.
417
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Tigers can see 6 times better at night than humans.
305