When you take a step, you are using up to 200 muscles.
886
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Enamel is hardest substance in the human body.
61
Your heart will pump about 212 million liters in its lifetime.
26
The average sperm cell swims at 8 inches per hour.
76
Chewing gum boosts your brain power.
285
Your thumb is about the same size as your nose.
124
Poor eyesight (myopia) is associated with higher IQ.
232