The power of acts of kindness
Kindness is not simply an act of compassion; it also produces a hormone that has a healthful effect on the heart's arteries. Lee Cowan talks with author David Hamilton, who teaches about the physical and biochemical benefits of kindness; to a couple who set out to do one small act of kindness every day for an entire year, spreading the news on social media; and to the founder of Think Kindness, a program to teach schoolkids that no kind act is too small.