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flag Dominant chacma baboons sleep worse due to disturbances from lower-ranking troop members, first evidence of social rank affecting wild primate sleep.

flag A new study in Current Biology finds that dominant chacma baboons in South Africa experience poorer sleep quality due to nighttime disturbances from lower-ranking troop members, marking the first evidence linking social hierarchy to sleep patterns in wild primates. flag Researchers used GPS and accelerometer collars to track a wild troop, discovering higher-ranking baboons are more frequently awakened, likely due to their central group positions. flag While it’s unclear if these disruptions affect long-term health, the findings suggest leadership in baboons, like humans, may come with a nighttime cost to rest and recovery.

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