Ancient rocks boost case for mini ice age linked to fall of Rome

Unusual rocks on an Icelandic beach were dropped there by icebergs, adding to evidence that an unusually cool period preceded the collapse of the Roman Empire

​Unusual rocks on an Icelandic beach were dropped there by icebergs, adding to evidence that an unusually cool period preceded the collapse of the Roman Empire Unusual rocks on an Icelandic beach were dropped there by icebergs, adding to evidence that an unusually cool period preceded the collapse of the Roman Empire