Sara Terry and her son, Christian, in Spring, Texas. After sequencing Christian's genome, doctors were able to diagnose him with a Noonan-like syndrome. Eric Kayne for NPR hide caption

itoggle caption Eric Kayne for NPR

Surgeons transplant a kidney in 8-year-old Sarah Dickman at Children's Healthcare of Atlanta in 2008. The proposed changes in the transplant list attempt to maximize kidney life in young patients. John Bazemore/AP hide caption

itoggle caption John Bazemore/AP

Watson, now 84, says sequencing helped explain his past sensitivity to certain drugs. But he didn't want to know everything his sequenced genome revealed about his health future. Courtesy of Cold Spring Harbor Laboratory hide caption

itoggle caption Courtesy of Cold Spring Harbor Laboratory

Slides containing DNA sit in a bay waiting to be analyzed by a genome sequencing machine. David Paul Morris/Bloomberg via Getty Images hide caption

itoggle caption David Paul Morris/Bloomberg via Getty Images

Human chromosomes like these contain genes and lots of other genetic material whose function has been a mystery. National Cancer Institute via AP hide caption

itoggle caption National Cancer Institute via AP

Social worker Shannon Coyne and her husband decided against circumcision for their son, now 11 months old. The nation's most influential pediatricians group says the health benefits of circumcision in newborn boys outweigh any risks and that insurance companies should pay for it. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP

Health officials say they're worried that one day there will be no more antibiotics left to treat gonorrhea. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Christopher Doll releases fish into the water of a neglected pool to kill mosquitoes that might carry West Nile Virus in Concord, Calif., in 2009. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

The white arrows in these two tumor samples point to a subset of tumor cells that are in a resting state. Nature hide caption

itoggle caption Nature

Pedometer, an app, keeps track of your steps, distance traveled and calories burned. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR

Human embryos under a microscope at an IVF clinic in La Jolla, Calif. Sandy Huffaker/Getty Images hide caption

itoggle caption Sandy Huffaker/Getty Images

Which one of these sunscreens would be considered safe and correctly labeled by the Food and Drug Administration? Not a single one. Safe sunscreens are SPF15 or higher, and the new rules require those with broad-spectrum protection to include the term next to and in the same style as the sun protection factor. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR