| Related post: https://www.quantamagazine.org/sleep-evolved-before-brains-h... And an interesting comment of someone on FB: Hydra Hydra have a diffuse neural system But no brain to speak of A simple creature echoing older, more primitive forms They doze off, so we've found Using familiar chemistry To slumber every four hours When I sleep I descend like a bathysphere Down through layers of earlier incarnations Dipping below the surface Leaving the airy light of consciousness behind To enter the involuntary dream world of Freud and Jung Deeper still then dreams themselves disperse Slipping away like darting fish Leaving me reptilian, autonomic, just breath and pulse But there's further to go - into the abyssal dark To reach my fundamental hardware Where I am the hydra https://www.facebook.com/QuantaNews/posts/1789738887890362 |