It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The average person's skin weighs twice as much as their brain.
131
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Only humans shed emotional tears.
331
The human sigh acts as a physiological reset button.
23
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191