A biogeochemist shows how oysters help clean oceans; a video game producer explains the math behind games; a NASA electrical engineer assembles a battery out of lemons; a chemistry teacher cooks up biodiesel in her lab.

A cosmetic chemist shares the science of lipstick; a wildlife biologist studies the animals of Alaska's wetlands; a geologist reveals the properties of common minerals; an aerospace engineer demonstrates how turbines harness the power of wind.