The human brain doesn't stop developing until about 25 years old.
102
The average person will go on a date at least 100 times before they finally marry.
33
Pain occurs when sounds are above 130 db.
124
Your thumb is about the same size as your nose.
124
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11