That's when major milestones tend to occur, study author says

Fitness, nutrition, proper sleep and TV restrictions appeared to make a difference in study of city kids

Early exposure to parental tension is a risk factor for later mental woes, researchers say

Preliminary research suggests potential for earlier diagnosis

Preliminary research suggests potential for earlier diagnosis

Scientists found it boosted development of complex networks involved in thinking

Researchers urge more study of long-term effects on thinking, memory

U.S. health officials recommend learning to use publicly placed defibrillators

More Than 1 in 4 U.S. Employees Work When Sick: Survey Colorado, Utah Move to Raise Tobacco Age to 21 U.S. Veterans Receiving Unproven Therapies: Experts

Early study sought to reduce patients' exposure to radiation's side effects