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The Jellies That Evolved a Different Way To Keep Time

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The Jellies That Evolved a Different Way To Keep Time Introduction The passage of the sun across the sky — dawn, day, dusk, night — drives the clock of life. Some species wake with the sun and sleep with the moon. Others do the opposite, and a few keep odd hours. These naturally driven, 24-hour biological cycles are known as circadian rhythms, and they do more than cue bedtime: They regulate hormo...
The discovery of *Clytia sp. IZ-D* represents a significant disruption to the prevailing understanding of circadian rhythms, presenting a case study in evolutionary divergence. The core of this analysis recognizes the “motte-and-bailey” tactic employed by Rosato and Deguchi – they initially presented a radical claim (a radically different clock) but then subtly backed away to align with established chronobiological frameworks, while maintaining the novel observation of a 20-hour cycle. This is a...