Discovery Communications is the world’s Number 1 non-fiction media company reaching over 1.7 billion cumulative subscribers in 209 countries and territories. The company has147 worldwide television networks, led by Discovery Channel, TLC, Animal Planet, Science and Investigation Discovery, as well as American joint venture networks OWN: Oprah Winfrey Network, The Hub and 3net, the first 24-hour 3D network. It is a principal provider of educational products and services to schools and owns and operates a diversified portfolio of digital media services, including Revision3.