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Dreams of an anteater

发布时间:2019-03-07 03:15:02来源:未知点击:

By Rachel Nowak ONE of the most primitive mammals has thrown theories about the evolution of rapid eye movement sleep into disarray. A controversial new study suggests that egg-laying echidnas do have REM sleep—but only when the temperature is just right. REM sleep remains a mystery. Researchers speculate that it may do anything from helping consolidate memories during dreaming to mixing up fluid in the eyeballs to ensure oxygen gets to the cornea. All birds and placental mammals that have been tested have REM sleep, but according to several studies, echidnas,