ELI5: What happens when late after dinner, you're browsing online and feel sleepy, but continue browsing..., and thirty minutes later, you're wide awake once again, for a few hours more. How can you postpone sleep, and where does the extra energy come fro

ELI5: What happens when late after dinner, you're browsing online and feel sleepy, but continue browsing..., and thirty minutes later, you're wide awake once again, for a few hours more. How can you postpone sleep, and where does the extra energy come from? * /r/explainlikeimfive

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