Dinosaur-killing Asteroid Could Have Caused 2 Years of Darkness

Tremendous amounts of soot, lofted into the air from global wildfires following a massive asteroid strike 66 million years ago, would have plunged Earth into darkness for nearly two years, new research finds.
Read more: http://astrobiology.com/2017/08/dinosaur-killing-asteroid-could-have-caused-2-years-of-darkness.html?source=Snapzu