A blanket of soot from asteroid impact may have killed off dinosaurs


Scientists may have solved the mystery behind one of the five mass extinctions in Earth's history – a time 65 million years ago at the end of the Cretaceous period when a meteor struck the Earth and wiped out dinosaurs and nearly every living creature on the planet. The reason? A blanket of soot cast the Earth into darkness for up to two years, according to a new study.