Were there 2 Piltdown Hoaxers?

Here's even more stuff about the Piltdown Man (there's a lot of stuff about this because of the anniversary of the exposure of the fraud). The Independent reports that two academics are going to give a lecture in which they'll argue that two independent hoaxers were responsible for the piltdown frauds. But as far as I know, this theory has actually been floating around for a while.

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