
Commune with Jeff Krasno Sleep Essentials: Sleep Across Species
Dec 23, 2025
Dive into the fascinating world of sleep across species! From dolphins snoozing with half a brain awake to octopuses dreaming in vibrant colors, the animal kingdom reveals unique sleep adaptations. Discover how rats replay mazes and birds rehearse songs while dreaming, shedding light on memory and evolution. Finally, reflect on how modern life disrupts our natural instincts for rest, encouraging us to observe animal sleep habits and relearn the importance of stillness.
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Sleep Is An Ancient Universal Rhythm
- Sleep is universal across species and is an ancient biological rhythm, not a luxury.
- Jeff Krasno frames sleep as what makes creatures whole by enabling memory, repair, and dreaming.
Sleep Adapts To Survival Needs
- Evolution adapts sleep to survival, from micro-naps to protective cocoons.
- Species-specific strategies show sleep trades vulnerability for safety and function.
Half-Brain Sleep And Human Vestige
- Many animals use unihemispheric sleep to stay alert while resting.
- Humans show a related 'first night effect' where one brain hemisphere stays more vigilant in new places.
