Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
It takes approximately 12 hours for food to entirely digest.
93
Your fingernails grow faster in summer.
744
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
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Your thumb is about the same size as your nose.
124