Christopher Knight is an author who has written several books dealing with pseudoscientific conspiracy theories such as 366-degree geometry and the origins of Freemasonry.
In an interview about the book Who Built the Moon?: 2005 Knight stated that the moon is an artificial construction probably built by humans with a message in "base ten arithmetic so it looks as though it is directed to a ten digit species that is living on Earth right now - which seems to mean humans." He believes that it was created to make life on Earth possible, including humans, and that the most likely builders were humans of the future using time travel.[1]