The largest cell in the human body is the female egg and the smallest is the male sperm.
682
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
Pain occurs when sounds are above 130 db.
124
Yawns are more contagious among people with closer relationships.
163
Only humans shed emotional tears.
331
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The average person will go on a date at least 100 times before they finally marry.
33