Half the vaccines that are manufactured each year don’t make it to their destination, getting lost or damaged along the way between manufacturer and remote health clinics. That means that each year, 1.5 million children in the developing world die needlessly. Neuroscientist and TED Fellow Catharine Young explains a novel approach she thinks can fix the problems.

2.5 billion people around the global don’t have access to a toilet, and feces is to blame for a devastating toll of disease. Journalist Rose George explains why we need to start talking shit.