Jamie Oliver during a scene filmed in Los Angeles from the second season of "Jamie Oliver's Food Revolution" on ABC. Mitch Haddad/AP hide caption

itoggle caption Mitch Haddad/AP

Are BPA-free bottles really safer than the ones that are chock-full of bisphenol A? Good luck trying to find out. David McNew/Getty hide caption

itoggle caption David McNew/Getty

Study author Virginia Rauh of Columbia University recommends that parents wash all fruits and vegetables and buy organic when possible. iStockphoto.com hide caption

itoggle caption iStockphoto.com

The placenta, the nutrient-rich organ shown in this model as the layer above the baby's feet, makes its own serotonin. Mark Evans/iStockphoto.com hide caption

itoggle caption Mark Evans/iStockphoto.com

Should a high school student building a DNA model also have his genetic code tested for disease risks? iStockphoto.com hide caption

itoggle caption iStockphoto.com

Jackson Coles, 2, sits on the lap of his mother, Christy, and watches objects flash on a computer screen that also tracks his eye movement. J. Adam Fenster/University of Rochester hide caption

itoggle caption J. Adam Fenster/University of Rochester

Most of the stillbirths worldwide happen in south Asia and sub-Saharan Africa, and at least half of them take place during labor or birth. iStockphoto.com hide caption

itoggle caption iStockphoto.com