Do cnidarians sleep? A first answer...

Geraud

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Scientists are wondering when sleep appeared in the evolution.
We know that birds (aka modern dinosaurs) sleep, as well as reptiles.

But do brainless animals sleep? This study published in September shows a sleep-like pattern from Cassiopea (the upside down jellyfish). They are also susceptible to sleep inducing medecine.

Soon we will dose coffee to wake our Acroporas!

https://www.nature.com/news/jellyfish-caught-snoozing-give-clues-to-origin-of-sleep-1.22654
 

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