Yawns are more contagious among people with closer relationships.
163
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human body contains over a billion miles of DNA.
147
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
On average, there's 100 billion neurons in the human brain.
83
Poor eyesight (myopia) is associated with higher IQ.
232
All 13 minerals necessary for human life can be found in alcohol beverages.
282