Dirt Is Good

From two of the world’s top scientists and one of the world’s top science writers (all parents), Dirt Is Good is a q&a-based guide to everything you need to know about kids & germs. “Is it OK for my child to eat dirt?” That’s just one of the many questions authors Jack Gilbert and Rob Knight are bombarded with every week from parents all over the world. They've heard everything from “My two-year-old gets constant ear infections. Should I give her antibiotics? Or probiotics?” to “I heard