An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
On average, there's 100 billion neurons in the human brain.
83
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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
A man's beard grows fastest when he anticipates sex.
239
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Our Right Lungs takes more air than our left lung.
194