Why Babies Sleep 18 Hours and Adults Need 8

Logosofia no Dia a Dia · May 24, 2026 · 27m

Why do newborns sleep 16-18 hours a day while adults manage on 7-8? It's not just about growth—it's about fundamentally different brain architectures. This episode explores the staggering 40,000 synapses per second infants produce, why REM sleep is their neural librarian, and how the brain's energy budget demands metabolic breaks. We cover the synaptic pruning hypothesis, the NPAS4 protein that sets a lower sleep threshold in babies, and the polyphasic-to-monophasic transition. Plus, the puberty-driven circadian shift that makes teenagers biologically unable to fall asleep before midnight—and…