> There's enough artificial light that circadian rhythm barely applies to teens. Citation needed. Circadian rhythm is influenced by a lot more than simply ambi

> There's enough artificial light that circadian rhythm barely applies to teens. Citation needed. Circadian rhythm is influenced by a lot more than simply ambiant light. > If you're tired enough to be "sleep deprived" then you're going to be perfectly capable of going to sleep at 10 instead of 1am, barring some insomniac disorder Insomniac disorders... like delayed hormonal response causing the circadian rhythm to be out of phase? > If you're tired, you can sleep at night. Note that the author eventually sleeps. It's simply out of phase.