Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...

Sleep may have evolved to help reduce DNA damage in nerve cells long before they became centralized in the brain, a study ...

Most animals don’t keep the same schedule we do. While we try to squeeze in eight hours and call it a good night, many animals snooze through more than half the day—and some barely stay awake at all.

Some animals can sleep with just half their brain at a time. Understanding this phenomenon can help us learn more about human ...

Jellyfish and anemones sleep to repair neuronal DNA damage Jellyfish and sea anemones extend sleep when neuronal DNA is ...

In jellyfish and sea anemones, neurons accumulate DNA damage while animals are awake and repair that damage during sleep.