What's up in
Sleep Evolved Before Brains. Hydras Are Living Proof.
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.
Brain’s ‘Background Noise’ May Hold Clues to Persistent Mysteries
By digging out signals hidden within the brain’s electrical chatter, scientists are getting new insights into sleep, aging and more.
Sleeping Brain Waves Draw a Healthy Bath for Neurons
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.
Dueling Brain Waves Anchor or Erase Learning During Sleep
While we sleep, one kind of slow brain wave helps to reinforce memories, but a competing wave weakens them.
You Are Getting Sleepy — Tagged Proteins May Point to Why
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.