Fascinating video that shows how we went from 0.3 billion people to 7 billion in 1000 years:
[youtube=http://www.youtube.com/watch?feature=player_embedded&v=VcSX4ytEfcE]
Fascinating video that shows how we went from 0.3 billion people to 7 billion in 1000 years:
[youtube=http://www.youtube.com/watch?feature=player_embedded&v=VcSX4ytEfcE]