Sleep

For each bad night of sleep in a one-month period, participants reported feeling three months older, on average, than they really are.

Bad Sleep Can Make You Feel Years Older Than You Really Are, Study Suggests

After just two nights of short sleep, a person’s “subjective age,” or how old they feel, can spike by more than four years

People march in Grand Rapids, Michigan, in 2021, after police in Louisville, Kentucky, killed Breonna Taylor, a Black woman, the year before. Tawanna Gordon, Taylor's cousin, leads the march.

After Police Kill Unarmed Black People, Black Americans Lose Sleep, Study Finds

New research draws a link between unequal exposure to police violence and lack of sleep for Black adults

While they chew their cud, reindeer brains shift into a state of non-REM sleep.

Reindeer Sleep and Eat Simultaneously, Saving Precious Time in the Short Arctic Summer

While the animals chew their cud, they also enter a state of rest

Scientists surveyed nearly 1,000 U.S. parents during the first half of 2023 to estimate melatonin use among kids.

Melatonin Use Is Rising in U.S. Children, Study Finds

Nearly one in five children under 14 are being given melatonin before bed, according to a survey of about 1,000 parents

Early risers may be able to thank their Neanderthal ancestors.

Neanderthal DNA May Help Explain Why Some People Are Early Risers

A new study finds a link between Neanderthal DNA and modern human genes related to the internal body clock, or circadian rhythm

Chinstrap penguins incubate eggs.

Chinstrap Penguins Sleep Over 10,000 Times a Day—for Just Four Seconds at a Time

The amazing microsleep strategy may be an adaptation to group living and lurking predators in a harsh Antarctic environment

Researchers have found bouts of REM-like activity in cuttlefish.

Do Other Animals Dream?

Researchers are finding signs of multiple phases of sleep all over the animal kingdom, including some that look very much like REM

Pienza's historic city center, which Pope Pius II redesigned in the 15th century, is a UNESCO World Heritage Site.

This Italian Town Silenced a Historic Bell That Kept Tourists Awake. Now, Locals Can't Sleep

The bell battle in Pienza, located in Tuscany, is just the latest example of Italy's tourism troubles

Neuroscientist Eugene Aserinsky attaches electrodes to his son, Armond, who was a frequent subject in his early sleep studies

The Stubborn Scientist Who Unraveled A Mystery of the Night

Fifty years ago, Eugene Aserinksy discovered rapid eye movement and changed the way we think about sleep and dreaming

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