Humans and other mammals cycle through distinct sleep phases. One of them is easily recognized by the darting motion of the ...
Some fish, it turns out, are morning people. They swim hard during daylight, sleep mostly at night, and tend to live longer. Others drift into daytime napping early in life, move less vigorously, and ...
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Do Fish Really Sleep? Their Quietest Secret Revealed
You’re staring at your aquarium. It’s late. Everything is quiet. And there’s your fish, floating calmly, fins moving slowly, eyes wide open. Are they... asleep? Or just zoning out? Fish don’t come ...
Choudhary, V., Heller, C.R., Aimon, S. et al. Eye movement kinematics reveal novel circadian organization of sleep substates. Nat Commun 17, 4068 (2026). https://doi.org/10.1038/s41467-026-72222-0 ...
A new study found that subtle differences in an animal’s behavior by midlife can predict how long it is likely to live.
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