February 4, 2009 2:40 pm Twin Study: Anti-Aging You’d think identical twins would age the same, but healthy lifestyle choices have a big impact on how they aged. Find out the secrets of the younger looking twins. US & World Videos 5:44 May Day demonstrations, Gaza war protests continue across Bay Area 3:27 May Day demonstrations planned, Gaza war protests continue across Bay Area 2:27 Junk fee law bans restaurant surcharges 1:45 NYPD enters Columbia University in riot gear to clear protest 2:27 ‘California Forever' plan moves forward