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Daniel W. Davison's avatar

Another reason to put phones away at night that I thought was compelling was explained to me more or less as follows. Our biology has not caught up with modern technology, and so when we see a notification light come on when we’re sleeping, our body as a whole reacts to the sudden burst of light as a potential threat, because it shouldn’t be there. It would be like sleeping under the cover of dense foliage, and then having that foliage parting to reveal moonlight and starlight. The body is like, “Did a predator just pull that foliage away?”

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