An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Only humans shed emotional tears.
331
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
On average, there's 100 billion neurons in the human brain.
83
Yawns are more contagious among people with closer relationships.
163
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15