It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
You forget 90% of your dreams.
256
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
The human eye blinks an average of 4,200,000 times a year.
233
