Italian Prime Minister Silvio Berlusconi has burnished his reputation as someone who likes to act much younger than most 73-year-olds. Now he's backing two biotech companies that are pursuing new therapies to slow or reverse the effects of aging as well fight cancer. He now owns a large chunk of Milan-based Molecular Medicine and has invested in San Raffaele del Monte Tabor, which is building a new R&D center to study new anti-aging drugs. Report