National Geographic Society
National Geographic Society is a scientific and educational organization originally founded in 1888 as an explorer's club. Around the world, it is mostly known for/conflated with the National Geographic Magazine.
The magazine itself was originally a text-only publication, similar to a scientific journal, but after the first decade of the 20th century it became increasingly known for its photographic illustrations from all over the world. Among the youth in the uptight USA of the 1950s, it also became notorious for its (un)coverage of various indigenous peoples' naughty bits.
“”When I was an adolescent, the only reliable source of breast visuals was National Geographic, a magazine then devoted, as far as I can tell, to doing feature articles on every primitive tribe in the world in which the women went around topless.
 National Geographic Channel
Or simply Nat Geo, this channel is a joint effort between National Geographic Television and Film (known for their many, many, many documentaries seen in IMAX theaters) and Fox Cable Networks. Originally content to show documentaries of nature and the ever-changing world, they appear to have succumbed to the 75% interest of controlling stake by the subsidiary of Rupert Murdoch's News Corporation and spend quite a bit of airtime sucking on the teat of reality programming (which is not the same as reality programming) with shows like Alaska State Troopers, Fight Science, Pricing the Priceless and numerous programs dedicated to the search for evidence of Biblical figures. Also aired with some frequency are cryptozoology and UFO programs, nearly without exception from an infuriatingly credulous angle. Even worse are the shows that claim psychics have helped the FBI and other law enforcement agencies solve murders.
The success of the channel has spawned numerous other channels such as Nat Geo Wild, Nat Geo Junior, and others.