Age takes a toll on our internal clocks.
Universal Stopping Point Photography/Getty Images
December 22, 2015 Everyone has a set of genes that keeps the body on a 24-hour rhythm. As we get older, though, the main clock can malfunction. Researchers say a backup clock may try to compensate.
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Gulping down coffee to stay awake at night delays the body's natural surge of the sleep hormone melatonin.
September 16, 2015 Late-night coffee, tea or cola does more than keep you up, scientists say. The amount of caffeine in a double espresso can delay the internal clock in cells throughout your body by about 40 minutes.
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November 3, 2014 The effects of a time change can be significant and lasting for both hamsters and humans. Commentator Tania Lombrozo turns to an expert to learn more about circadian rhythms.
You've been there, and you know it doesn't feel good. But an app based on the science of circadian rhythms could help reduce the suffering of jet lag.
April 11, 2014 When it comes to resetting your biological clock, calculus can help. Mathematicians say they've found a faster way to adjust to time zone changes, and they've used it to drive a smartphone app.
Your skin knows the time.
October 10, 2013 A study shows that genes that help our skin withstand damage from ultraviolet light kick in during the day. At night, our skin focuses instead on regenerating cells that were damaged during the day. This built-in system helps protect us from premature aging and skin cancer.
The speckled sea louse.
September 26, 2013 The tiny organism has an internal clock that triggers it to swim vigorously every 12.4 hours, coinciding with the changing tide — even when it's removed from its habitat.
All in the name of science: Volunteers hike in Colorado during their one-week hiatus from electrical lighting.
Courtesy of Kenneth Wright
August 1, 2013 A week out in nature — away from electrical lights — quickly resets the body's internal clock, scientists say. And it helps night owls who have problems waking up be more alert in the morning. The findings suggest some easy ways to help everyone hop out of bed with more energy.
July 26, 2013 Over drinks in the light of a full moon, a group of Swiss sleep researchers recently realized they could put a bit of folklore about the moon's disruptive effect on sleep to the test. The answer surprised them and didn't quite win over some other scientists in the field.
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The time of day you eat really does make a difference when it comes to health outcomes.
July 24, 2013 When the timing of meals doesn't match well with sleep-wake cycles, that can set your body's circadian rhythms out of sync, which in turn can throw off the body's ability to process food, resulting in extra energy stored as fat.
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