New Delhi, Nov 13 (ANI): A new study has revealed that teenagers who go to bed late during the school year are more likely to face academic and emotional difficulties in the long run, than teens who sleep early. Researcher at UC Berkeley analyzed longitudinal data from a nationally representative cohort of 2,700 US adolescents of whom 30 percent reported bedtimes later than 11:30 p.m. on school days and 1:30 a.m. in the summer in their middle and high school years. By the time they graduated from high school, the school-year night owls had lower GPA scores, and were more vulnerable to emotional problems compared to their earlier-to-bed counterpart.