Watching too much TV may not literally “rot your brain,” as children were once regularly warned, but it really will raise kids’ risk of developing attention and learning problems. That’s according to a new study of 678 mother-child pairs by the Columbia University College of Physicians and Surgeons. The study, published in the May issue of the Archives of Pediatrics and Adolescent Medicine, noted that the amount of TV kids watched when they were 14 was positively linked with having attention problems later, not doing homework, being bored at school, not finishing high school and “hating school.”