January 16, 2026In this Research Roundup, we provide an overview of recent research about adolescent development that highlights how the speed and timing of puberty shape brain development, how feeling economic hardship impacts youth outcomes, and the importance of mentors in lowering feelings of loneliness during the transition from adolescence to adulthood.- December 8, 2025Our adolescent years—from around 10 to about 25—are a period of remarkable growth and opportunity. We learn to make decisions,…



