David Thompson didn't want to sit around in retirement. A fan of NASCAR since he was a kid, the 66-year-old now shares his knowledge and passion for the sport with others as a part-timer at the NASCAR Hall of Fame. "It gives me a chance to get out, meet the public, and enjoy life."

The hypothesis: Trees improve people's health. The experiment: Remove 100 million trees in the eastern and midwestern U.S. over the course of 10 years and see what happens. What happened: People died. Is it that simple? Our readers said, no. So we asked one of the authors of the study to address their concerns.

Can someone else patent your genes? No, according to a closely-watched ruling from the U.S. Supreme court Thursday morning. Biotech companies must "create" something to patent it, the justices ruled unanimously. Do you agree?

Two terminally ill children with end-stage cystic fibrosis are at the center of a battle about organ transplants. In Philadelphia, a federal judge decided that both kids, who are younger than 12, must be made more of a priority on a waiting list for adult lungs. Ray Suarez gets analysis from Arthur Caplan of New York University.

Deepak and Sanjiv Chopra speak with NPR's Michel Martin about their new memoir, Brotherhood.

In 2000, at age 28, Neeley Wells was diagnosed with ovarian cancer.

Gay people "experienced a loss of safety" and felt treated as "second-class citizens," experts say.

New research and increasing awareness is helping patients live with the often devastating disease.