“In the early 20th century the need to find this missing link became so desperate that an elaborate hoax was created. Piltdown Man (“discovered” in 1912) was believed to be genuine for over 40 years. In fact is was faked using a Medieval human skull, the jaw bone of an orangutan and fossilized teeth from a chimpanzee, and then “aged” by soaking it in acid and staining it with an iron solution.”