Environment
Baby monkeys smile in their sleep – more so than human babies
Videos of sleeping baby Japanese macaques show they smile much more than human babies. Â Are they having sweeter dreams?
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Videos of sleeping baby Japanese macaques show they smile much more than human babies. Â Are they having sweeter dreams?
The purpose of sleep may be to weaken the new brain connections we form during the day, ensuring we have enough capacity to form more memories when we wake up