Dark Star shirt

Given the Dark Star shirt Moreover different day vs. night ecosystems, it is natural that animals that have a survival edge during one phase of the 24 hour cycle would use the other phase for sleeping. “Diurnal” animals are specialized for engaging with the daytime environment, whereas “nocturnal” animals cats, kangaroos, owls are specialized for night and sleep during the day. However there are other patterns as well, such as “crepuscular” animals that are active at the daynight boundary dawn, dusk. There appears to be no one single sleep activity that is the reason for sleep. Because the sleepwake division of the 24hour activity cycle has been around in animals for a long time all known animals have a quiescent period the sleep period has had hundreds of millions of years to acquire multiple uses.

Dark Star shirt,hoodie, tanktop, sweater, longsleeve tee

Dark Star shirt

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