<P> Smithsonian Networks is a joint venture between CBS Corporation's Showtime Networks, Inc. and the Smithsonian Institution . The service consists of Smithsonian Channel, Smithsonian On Demand, and smithsonianchannel.com . </P> <P> The network's content is inspired by the Smithsonian Institution's museums, research facilities and magazines . It features original non-fiction programming that covers a wide range of historical, scientific and cultural subjects . It is also available from On Demand in both high definition and standard definition . </P> <P> As of February 2015, approximately 33.6 million American households (28.9% of those with television) receive Smithsonian Channel . </P> <P> The Smithsonian Channel features a wide array of programming covering science, nature, culture, history, air and spacecraft, and documentaries . They create everything from long - running series to one - off, in depth specials . </P>

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