Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
The human brain doesn't stop developing until about 25 years old.
102
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Your fingernails grow faster in summer.
744
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
The human sigh acts as a physiological reset button.
23
Obsessive nose picking is called Rhinotillexomania.
101