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http://en.wikipedia.org/wiki/Richard_C._Hoagland
Richard Charles Hoagland,[1] most commonly known as Richard C. Hoagland, (born April 25, 1945) is an American author and a proponent of various conspiracy theories about NASA, lost alien civilizations on the Moon and on Mars and other related topics. Claims from his personal biography[2] and publication[3] include having been curator for a science museum in Springfield Massachusetts at age 19 in the mid-60s.[4] Hoagland does not have any scientific training.
His writings claim that advanced civilizations exist or once existed on the moon, Mars and on some of the moons of Jupiter and Saturn, and that NASA and the United States government have conspired to keep these facts secret. He has advocated his ideas in two published books, several videotapes,[5][6][7] lectures,[8] interviews,[9][10] and press conferences.[11] His views have never been published in peer-reviewed journals[12]. Hoagland has been labeled by James Oberg of The Space Review and Phil Plait of Bad Astronomy as a conspiracy theorist and fringe thinker.[13][14]
Many scientists have responded to Hoagland's claims and assertions. Professional astronomer Phil Plait described Hoagland as a "pseudoscientist" and his claims as "ridiculous."[84] In 2002, Ralph Greenberg, Professor of Mathematics at University of Washington, Seattle, wrote a paper asserting that the logic of Hoagland's deductions from the geometry of Cydonia Mensae is flawed.[85] The claim that the crashing of the Galileo Probe into Jupiter caused a "mysterious black spot" on the planet has since been disputed by both NASA and Dr. Plait. There is photographic evidence that a similar "black spot" was present in imagery of Jupiter taken in 1998. A second image referenced by Dr. Plait shows a dark ring which looks similar to the spot Hoagland cited.[86] In 1995 Malin Space Science Systems, NASA prime contractor for planetary imaging, published a paper critiquing claims that the 'city' at Cydonia is artificial, the claimed mathematical relationships, and very specifically denying any claims about concealing questionable data from the public.[87]