About 80,000 years ago, the estimated number of humans was about 10,000. Previous to this period, the numbers were higher and the reason for this reduction in numbers was a series of pandemics being hunted by dinosaurs like the voracious Tyrannosaurus Rex severe weather conditions the break up of the super continent of Pangaea

About 80,000 years ago, the estimated number of humans was about 10,000. Previous to this period, the numbers were higher and the reason for this reduction in numbers was a series of pandemics being hunted by dinosaurs like the voracious Tyrannosaurus Rex severe weather conditions the break up of the super continent of Pangaea