Cracking sleep's evolutionary code: Neuron protection traced back to jellyfish and sea anemones

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Daily briefing: Animals without brains sleep too — hinting at why we sleep at all

Unknown Source

• 34d ago

Daily briefing: Animals without brains sleep too — hinting at why we sleep at all

Jellyfish seem to sleep in ways strikingly similar to humans, despite not having a brain. Plus, US lawmakers have pushed back on proposed cuts to science and why cancer can come back years after successful treatment. Jellyfish seem to sleep in ways strikingly similar to humans, despite not having a brain. Plus, US lawmakers have pushed back on proposed cuts to science and why cancer can come back years after successful treatment.

Reddit Science

• 34d ago

Jellyfish sleep like humans — even though they don’t have brains. The findings bolster a theory that sleep evolved, at least in part, to protect the DNA in individual nerve cells, helping to repair damage that builds up while animals are awake.

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Corals sleep like us, but their symbionts never rest

Phys.org - latest science and technology news stories

• 12d ago

Corals sleep like us, but their symbionts never rest

Sleep is essential for much of the animal kingdom. During the night, neuron and tissue repair mechanisms are activated to aid recovery from daily activity. This is risky: organisms that sleep are more vulnerable to predators. However, the phenomenon extends from mammals to invertebrates. Nevertheless, until now it was not known whether other, more ancient groups without neurons, such as corals, engage in any kind of nocturnal rest.