GABA brain chemical

Science Times - New Study Reveals Evolution of Sleep Prior to That of Brains

Study Reveals Sleep Evolved Ahead of Brain Evolution

Medicine & Technology Jan 11, 2021

Researchers of a new study recently identified a state akin to sleep in a tiny, freshwater animal, also known as "hydra," which has simple anatomy and doesn't have a brain.

GABA brain chemical

Study Reveals Sleep Evolved Ahead of Brain Evolution

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