Why Jet Lag Feels Worse Depending on Your Travel Direction

Jet lag is the pits, but it is even worse when you travel east. Michelle Girvan (a physicist at the University of Maryland who also co-authored a model published this week) says it’s because, “The body’s internal clock has a natural period of slightly longer than 24 hours, which means that it has an easier time traveling west and lengthening the day than traveling east …