Workplace smoking bans reduce the number of cigarettes smoked and encourage at least some smokers to kick the habit altogether. But what about non-smokers? Encouraging findings show that smoke-free laws dramatically reduce heart attacks even among people who don’t smoke.

Smile and the world smiles with you, the saying goes. Cheerful findings from a groundbreaking study prove it. An exclusive interview with social network researcher James H. Fowler on how happiness spreads.

A lot of people said it couldn’t be done. Today, health experts say indoor smoking bans have improved respiratory health and even helped many smokers kick the habit.