Parents now have more advice to consider when it comes to choosing organic foods. Here, Theo Shriver, 6, weighs organic produce at the Puget Consumers Co-op in Seattle. Elaine Thompson/AP hide caption

itoggle caption Elaine Thompson/AP

Inglewood High School cheerleaders perform in front of the Space Shuttle Endeavour as it is transported through the streets of Inglewood and Los Angeles on October 13. ROBYN BECK/AFP/Getty Images hide caption

itoggle caption ROBYN BECK/AFP/Getty Images

A rabbi holds up a pillow used during ritual circumcision at a synagogue in Berlin. Markus Schreiber/AP hide caption

itoggle caption Markus Schreiber/AP

A label warns parents to keep Tide laundry detergent packets away from small children. Pat Sullivan/AP hide caption

itoggle caption Pat Sullivan/AP

During the peak of the polio epidemic in the U.S., some hospital wards even had large, room-like iron lungs where multiple children lived. Courtesy of Boston Children's Hospital Archive hide caption

itoggle caption Courtesy of Boston Children's Hospital Archive

Women and their children wait for medication and instructions on how to use it at the clinic in Dareta, Nigeria. Treating children with high levels of lead is a painstaking process that works only if their environment at home is free from lead. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

A young boy works at an illegal gold mine in Dareta, Nigeria. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Many Haitian children suffer from "stunting" due to inadequate nutrition. Health experts now are trying to prevent this with snacks made from peanut butter, fortified with vitamins and minerals. Alex E. Proimos/via flickr hide caption

itoggle caption Alex E. Proimos/via flickr

Women and their children wait for medication and instructions on how to use it at the clinic in Dareta, Nigeria. Treating children with high levels of lead is a painstaking process that works only if their environment at home is free from lead. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Sam Berns, 15, who has the very rare premature-aging disease progeria, plays the drums in his high school's marching band. Courtesy of the Progeria Research Foundation hide caption

itoggle caption Courtesy of the Progeria Research Foundation