It's 48 years since Neil Armstrong took that historic first step onto the Moon, but some people still think the whole thing was a gigantic hoax.
Some of the conspiracy theorists claim all the six landings with humans on board between 1969 and 1972 were faked, and that the 12 astronauts that Nasa says walked on the Moon - from the Apollo 11, 12, 14, 15, 16 and 17 missions - never did so.
The disbelief has continued despite high definition images from Nasa's lunar reconnaissance orbiter taken in the past eight years or so showing such things as lander modules, astronaut footprints and flags at the Apollo landing sites.
In an allegedly faked photo, the shadows are not parallel, which conspiracists claimed could only happen with more than one light source.
To test the claims, the mythbusters used a big studio light to represent the Sun, then made a miniature set of the Moon. When seen through a camera, the shadows in the mock up were initially parallel, as the conspiracists claim they should be.
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