The impressive Human video Population Through Time that you will see below, describes the increase of the earth's population in the last thousands of years. You will notice that it took a long time for the population explosion to take place.
To be more specific it took us 200 thousand years to reach the first billion people, but only 200 years to hit the seven billion mark. 
Watch the video with the map that tracks the growth of the world's population. The video shows how we spread around the world and highlights empires and historical events over the years.
Το πολύ ενδιαφέρον βίντεο Human Population Through Time που θα παρακολουθήσετε ανέβηκε στο YouTube από το American Museum of Natural History or American Museum of Natural History.
Watch it
