Adolescents who sleep for longer — and from an earlier bedtime — than their peers tend to have improved brain function and perform better at cognitive tests, researchers have shown. But the study of adolescents in the US also showed that even those with better sleeping habits were not reaching the amount of sleep recommended […]

Dopamine is the brain’s motivational spark, driving us to chase what feels good, say scrolling another reel on social media, and steer clear of what doesn’t, like touching a hot stove. But scientists haven’t fully understood how dopamine helps us learn to avoid bad outcomes — until now. A new study shows that dopamine signals […]