Flooding in the U.S. Midwest is front-and-center today on CNN 10. You'll get an overview of what's happening and then see how it has directly impacted some communities. We're also reporting on a fireball that recently exploded over the Bering Sea, and we're showing you how mushrooms could change packaging as we know it. Then, the discovery of an extremely rare astrolabe gives clues about 14th Century maritime navigation.