The human eye blinks an average of 4,200,000 times a year.
233
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
The human sigh acts as a physiological reset button.
23
The average sperm cell swims at 8 inches per hour.
4
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Tigers can see 6 times better at night than humans.
305
Every human spent about half an hour as a single cell.
144