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Articles on Circadian rhythms

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While that ‘extra’ hour of sunlight in the evenings can be exhilarating, it comes with significant health trade-offs. Anna Blazhuk/Moment via Getty Images

Could the days of ‘springing forward’ be numbered? A neurologist and sleep expert explains the downside to that borrowed hour of daylight

Americans have long been divided over adopting permanent standard versus permanent daylight saving time. But support for permanent standard time grew dramatically between 2021 and 2024.
Scientific evidence allows parents to choose the sleeping arrangement that’s right for them and their family. (Shutterstock)

Is sleeping with your baby a good idea? Here’s what the science says

Questions about co-sleeping are often drowned out in a whirlwind of information and opinions. But science can provide some answers.
Owl chronotypes function better at night, while lark chronotypes are more energized in the morning. The Photo Matrix/Moment, nomis_g/iStock via Getty Images Plus

What’s your chronotype? Knowing whether you’re a night owl or an early bird could help you do better on tests and avoid scams

Synchronizing your daily activities to your circadian rhythm could help you improve your performance on a variety of cognitive tasks − and even influence diagnosis of cognitive disorders.
In the heat of the summer, time can sometimes appear like it’s melting away. However, our body clock is there to keep track of the hours gone by. Joseph Jacobs, Shutterstock

Biological clocks: how does our body know that time goes by?

Our bodies are able to perceive time thanks to our internal clocks, which are also used by the other living beings with which we interact.
Research shows that sleep deprivation impairs communication between brain regions and brain blood flow, damages brain wiring and makes a young brain look like an aged brain. (Shutterstock)

Sleep deprivation benefited our ancestors, yet harms us now — but staying fit may help us cope

Ancient humans chose to sleep less, which had evolutionary benefits. For modern humans, sleeping less is futile and detrimental, but fitness may be a powerful ally in today’s epidemic of sleep loss.
Daylight saving time is back again – amid some controversy. billhagolan/iStock via Getty Images Plus

Springing forward into daylight saving time is a step back for health – a neurologist explains the medical evidence, and why this shift is worse than the fall time change

Americans are divided on their preference for daylight saving time versus standard time. But research shows that our bodies fare better when aligned with the natural light of standard time.

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