Geochemist Gabriel Filippelli in an Indianapolis garden. Filippelli's research shows that many urban gardens may have soil contaminated with lead Courtesy of Gabriel Filippelli hide caption

itoggle caption Courtesy of Gabriel Filippelli

After recalls of a half-billion eggs, we will hear from the family tied to the farms at the center of the outbreak today. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

An AquAdvantage salmon behind a non-transgenic Atlantic salmon sibling of the same age. Courtesy of AquaBounty Technologies hide caption

itoggle caption Courtesy of AquaBounty Technologies