Feb. 2, 2018, 1:22 a.m.
Toward end of Ice Age, human beings witnessed fires larger than dinosaur killers
12,800 years ago, thanks to fragments of a comet, humans saw an astonishing 10 percent of the Earth's land surface, or about 10 million square kilometers, consumed by fires. https://www.sciencedaily.com/releases/2018/02/180201173251.htm
