JusticeISaid writes "The Washington Post is running a story today about a recent study by University of Virginia researchers which suggests that older passengers may suffer more from jet lag than younger ones. The research methodology involved advancing or retarding the exposure to light of laboratory mice; this produced a significantly higher rate of mortality among older mice than younger ones. The study also confirmed the widely held belief that it is more difficult to adjust to crossing time zones on Eastbound flights than when flying West. The Post article suggests that passengers flying from North America to Europe try to throttle their exposure to light on arrival — but the only sure fix is to travel by ship. No doubt it's also a good idea to leave your aging pet mice at home."