TravelJet Lag: Dealing With the Messy, Chaotic Biology of Crossing Time ZonesCrossing the world within hours comes with a toll—a reminder that the human body keeps its own time regardless of the clock in the airport.SavePrintCrossing multiple time zones can leave even the most seasoned traveler with jet lag. PeopleImages/ShutterstockEric Lucas2/18/2026|Updated: 2/18/20260:00X 1Jet lag is an ugly thing.Jet lag is for weaklings.We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.