Rock wildman Ozzy Osbourne has discovered how he managed to survive 40 years of drink and drug abuse - he's descended from Romans who lived through the eruption of Mount Vesuvius. The former Black Sabbath frontman has undergone complicated DNA testing for research scientists to map out his entire genetic make-up.

Experts were then able to use his profile to determine his possible ancestors - and the rocker discovered he is related to legendary U.S. outlaw Jesse James and Romans who survived the Vesuvius eruption in the year 79 AD.

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