The human brain is more active during sleep than during the day.
28
Yawns are more contagious among people with closer relationships.
163
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
One human hair can support 3 ounces.
191
Your heart will pump about 212 million liters in its lifetime.
26
The human eye blinks an average of 4,200,000 times a year.
233
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191