The body's internal master clock
What happens when the clock breaks
The mystery of the eastbound flight
The hidden costs of chronic jet lag
Outsmarting the lag
YOUR GOAL
Master of The science of jet lag
diego Eastbound Jet Lag Mystery
Eastbound: your body clock must advance. It's harder to shorten your day. Our natural rhythm prefers to delay.

diego Fly through shifting time zones to discover how jet lag affects your body's clock.
Natural day length: The human internal body clock naturally runs on a cycle of about 24.2 hours, not exactly 24 hours.
A natural internal process that regulates the sleep-wake cycle of an organism over a daily period. In 2016, Maryland researchers mathematically modeled brain cells to explain why traveling east disrupts this cycle more.
What is the scientific term for the process of resetting our internal biological clock to a new time zone?
According to studies, about how long does it take the body to adjust to each time zone crossed when flying east?
Which professional sports league's data showed that teams flying eastward win significantly fewer games?
What is the average length of the natural human internal body clock without environmental cues?
Which direction of travel aligns better with our natural biological tendency to delay our sleep schedule?


