Discovery Channel is a cable and satellite TV channel founded by John Hendricks and distributed by Discovery Communications. It provides documentary programming focused primarily on popular science, technology, and history. In the U.S., the programming for the main Discovery network is primarily focused on "reality-based" television themes, such as speculative investigation (with shows such as Mythbusters, Unsolved History, and Best Evidence), automobiles, and occupations (Dirty Jobs and Deadliest Catch); it also features documentaries specifically aimed at families and younger audiences.