The male impotence drug Viagra may be useful for treating jet lag, according to Argentinian researchers who gave it to hamsters and made them feel like rodent globe-trotters. Researchers have found that hamsters subjected to simulated jet lag recover better when given the drug, which is normally used to treat erectile disfunction. The researchers first manipulated the schedule of turning lights on and off to induce jet lag in the laboratory animals, they reported in the Proceedings of the National Academy of Sciences. Adult male hamsters given Viagra, also called sildenafil, recovered from jet lag up to 50 % faster...