But all that material is the work of people who are using the Theory of Evolution as a framework. They've concluded that Piltdown is a fraud because it doesn't fit the TOE. What's your reason?
What is truly shocking is not just that people in the early 20th century believed this but people now do with all the tools and resources available to properly date things.
Regards. If you are skeptical yet, just Google Piltdown man or better yet Piltdown Man Hoax. You can read for days.