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sleep

2021 in Review

The Year in Biology

By John Rennie
December 21, 2021
Read Later

The detailed understanding of brains and multicellular bodies reached new heights this year, while the genomes of the COVID-19 virus and various organisms yielded more surprises.

Video of a hydra moving against a dark background.
sleep

Sleep Evolved Before Brains. Hydras Are Living Proof.

By Veronique Greenwood
May 18, 2021
Read Later

Studies of sleep are usually neurological. But some of nature’s simplest animals suggest that sleep evolved for metabolic reasons, long before brains even existed.

An illustration of a human brain against “pink noise” static.
neuroscience

Brain’s ‘Background Noise’ May Hold Clues to Persistent Mysteries

By Elizabeth Landau
February 8, 2021
Read Later

By digging out signals hidden within the brain’s electrical chatter, scientists are getting new insights into sleep, aging and more.

2020 in Review

The Year in Biology

By John Rennie
December 23, 2020
Read Later

While the study of the SARS-CoV-2 virus was the most urgent priority, biologists also learned more about how brains process information, how to define individuality and why sleep deprivation kills.

Illustration of an extremely tired person, surrounded by empty coffee cups.
sleep

Why Sleep Deprivation Kills

By Veronique Greenwood
June 4, 2020
Read Later

Going without sleep for too long kills animals but scientists haven’t known why. Newly published work suggests that the answer lies in an unexpected part of the body.

Illustration of brain formed by bubbles.
Abstractions blog

Sleeping Brain Waves Draw a Healthy Bath for Neurons

By Elena Renken
December 16, 2019
Read Later

An organized tide of brain waves, blood and spinal fluid pulsing through a sleeping brain may flush away neural toxins that cause Alzheimer’s and other diseases.

Animation of one icon tracing a wave pattern over a brain, followed by another icon that erases the pattern.
neuroscience

Dueling Brain Waves Anchor or Erase Learning During Sleep

By Elena Renken
October 24, 2019
Read Later

While we sleep, one kind of slow brain wave helps to reinforce memories, but a competing wave weakens them.

Art for "You Are Getting Sleepy — Tagged Proteins May Point to Why"
neuroscience

You Are Getting Sleepy — Tagged Proteins May Point to Why

By Veronique Greenwood
August 21, 2018
Read Later

The identification of SNIPPs, a set of proteins found primarily at the brain’s synapses, brings science closer to understanding why we need to sleep.

Clock
Abstractions blog

How Circadian Clocks Differ From Sleep

By Veronique Greenwood
February 17, 2017
Read Later

The circadian clock is in nearly every cell, and researchers have untangled many of its secrets. But sleep has been harder to pin down.


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