Picture provided by the Nicholas School of the Environment
Post written by Kenneth Xu and Connie Wu
On October 18th, 2016, we attended renowned biologist Paul R. 379 more words
513 more words
It took human history until 1800 for the world population to reach one billion. The second billion was achieved in only 130 more years (1930), the third billion in less than 30 years (1959), the fourth billion in 15 years (1974), and the fifth billion in only 13 years (1987).