An article from today's National Geographic site positing that a volcanic eruption might have caused the start of the so-called Dark Ages in the sixth century. _http://news.nationalgeographic.com/news/2008/03/080319-global-dimming.html
Something that caught my attention in the article is in bold:
Something that caught my attention in the article is in bold:
A "dry fog" that muted the sun's rays in A.D. 536 and plunged half the world into a famine-inducing chill was triggered by the eruption of a supervolcano, a new study says. The cause of the sixth-century global dimming has long been a matter of debate, but a team of international researchers recently discovered acidic sulphate molecules, which are signs of an eruption, in Greenland ice. Scientists had suspected the dry fog was caused by a volcanic eruption or a comet strike, but searches had failed to uncover evidence for either catastrophe—until now.