
A sixth-century "mini" ice age may have been "the straw that broke the camel's back" that led to the final disintegration of the Western Roman Empire, a new study claims.
Between A.D. 536 and 547, three separate volcanic eruptions generated enough ash to block out the sun for between 200 and 300 years, cooling the Earth's surface by several degrees. Now, newfound evidence of this mini ice age has been found in Iceland.