13,000 Years Ago, a Firestorm Covered 10% of Earth’s Surface, Triggering an Ice Age

At a point some 12,800 years ago, a tenth of Earth’s surface suddenly became covered in roaring fires. The firestorm rivalled the one that wiped out the dinosaurs, and it was likely caused by fragments of a comet that would have measured around 100 kilometers (62 miles) across.   As dust clouds smothered Earth, they … Read more