Old Jaanix Posts

Hamsters are particular about when they climb into a wheel and begin running. Every day they start within five minutes of darkness. A hamster flown from Chicago to London would adjust gradually (as do humans). It would move its exercise schedule a little each day until it began running within five minutes of London darkness. Then it would stick with the new schedule. Dr Golombek and his colleagues shifted their hamsters' daylight regimes by exactly the Chicago-London time difference—six hours—and injected Viagra on the same day. One group of hamsters received enough of the drug to develop erections. These took about six days to adjust their body clocks. Another group that was given a smaller dose took eight days to adapt. Hamsters that did not receive Viagra took 12 days.