Bill Nye the Science Guy magnifies the big science behind tiny germs. By exploring the science of health and germs, Bill shows students how hand-washing, eating nutritious food, and getting enough exercise and sleep can help the human body fight illness. The Science Guy demonstrates that taking care of the body isn't just important to health and well-being, it's also Safety Smart!

"Allergies, obesity, asthma, diabetes, auto-immune and intestinal disorders are all on the rise, with the incidence of some diseases doubling every ten years. New research points to changes in the ecosystem of microbes that live on and inside every one of us -- our microbiomes -- as a major cause. But how could one's gut microbes increase the odds of developing conditions as radically different as asthma and diabetes? Hosted by Good Morning America's...