Enamel is hardest substance in the human body.
61
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
It takes approximately 12 hours for food to entirely digest.
93
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The human eye blinks an average of 4,200,000 times a year.
233
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
The average sperm cell swims at 8 inches per hour.
4