The average person will go on a date at least 100 times before they finally marry.
33
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Pain occurs when sounds are above 130 db.
124
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Tigers can see 6 times better at night than humans.
305
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