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I've worked with sleep labs on a project regarding actigraphy data and another interesting tidbit is the fact that we wake up 20-30 times per night but have no

I've worked with sleep labs on a project regarding actigraphy data and another interesting tidbit is the fact that we wake up 20-30 times per night but have no recollection of it. We don't know why this is the case, but one theory is related to the story of the ducks in the article. In our past we used to sleep in groups and so at every point in time, at least one group member was alert to watch out for predators.

belltaco 6y ago
>In our past we used to sleep in groups and so at every point in time, at least one group member was alert to watch out for predators This is also the reason behind evolutionary pressure to have a certain percentage of night owls among the tribe who naturally sleep late and act as eyes and ears against predators.
- smogcutter 6y ago
  That’s interesting, who says that?