It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The first man to swim the length of Great Britain grew a beard to stop jellyfish stinging his face.
16
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
46
All babies are color blind when they are born.
114