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...By studying rocks carried by icebergs from Greenland all the way to Iceland's west coast, a team of researchers has uncovered what they believe is more evidence for the severity of this mini ice age. Their findings, published April 8 in the journal Geology, point to the prolonged cooling being a key factor in the eventual decline of the Western Roman Empire — although not all historians agree...Economic crisis, government corruption,...