It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
We share 70% of our DNA with a slug.
218
Human hair and fingernails continue to grow after death.
7
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Your thumb is about the same size as your nose.
124
