How this page evolved

Every published version is kept. Each entry shows what changed and why. Earlier versions can be restored by moderators, but only if the material they rely on is still available.

1. Revision 3Oct 4, 2026, 8:44 AMLiveAI-organised, reviewed

   Added newly available evidence on reallocating time to sleep and mental health, smartphone use and insufficient sleep, and structural brain correlates of insufficient sleep; expanded the consequences section and takeaways accordingly, and added guidance on phone-free bedrooms and on shifting time toward sleep.

   • · The main finding was rewritten.
   • · Updated “Typical sleep patterns in adolescence”.
   • · Updated “What short sleep is linked to”.
   • · 3 new sources cited.
   • · The note on uncertainty changed.
   • · The key takeaways were revised.
   • · 2 new pieces of guidance for specific situations.
   • · 1 new open question.
2. Revision 2Oct 3, 2026, 6:20 PMAI-organised, reviewed

   AI-prepared Starting Map from live research.

   • · First published version.