“BY ALL accounts, I’m a medical miracle,” says Ozzy Osbourne, an ageing rock star who once bit the head off a live bat. For four decades Mr Osbourne (pictured above in his prime) drank too much and took prodigious quantities of drugs. Yet he survived. Now a reformed man, he is getting his entire genome sequenced by Knome, an American genetic-testing firm, for clues to how his body coped with such prolonged abuse. 

He is not alone in wondering what mysteries genetic testing might unlock. - Economist