Dec 18, 2013
Why Halley's Comet May Be Linked to Famine 1,500 Years Ago
SAN FRANCISCO — The ancients had ample reason to view comets as harbingers of doom, it would appear. A piece of the famous Halley's comet likely slammed into Earth in A.D. 536, blasting so much dust into the atmosphere that the planet cooled considerably, a new study suggests. This dramatic...