[pfranz]

I'm sure gaming and screen-time don't help, but it's fairly well known that younger people tend to stay up late and have difficulty waking up in the morning. In high school I never understood why they did certain things like offer AP classes only at 1st period or offer any "difficult" core classes 1st period (well, I knew it was convenient for them, but horrible for the average student). California just passed a law saying schools must start after 8am.

I remember hearing talk about a theory why younger people stay up late and older people get up early. It helped provide close to 24/7 monitoring of the village for danger.