CU Professor Debuts Film Theorizing That a Volcanic Eruption Initiated the Dark Ages

News Link
An anthropology professor's lifetime of research has led him to conclude that a large volcanic eruption in El Salvador in the year 535 caused a global cooling event that caused world-wide crop failures, famine, die-off of human populations and decline of civilizations. Recent investigations Link have concluded that this eruption was the 2nd largest in the last 200,000 years.