We blink 25 times a minute.
51
Pain travels through your body at 350 ft. per second.
36
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Fingernails grow fastest on the hand you favor.
44
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Every hour one billion cells in the body must be replaced.
17
The average human body contains enough iron to make a small nail.
50