Final answer:
The discoveries including Raymond Dart's find brought the authenticity of the Piltdown man into question, leading to its re-examination and subsequent unveiling as a hoax.
Step-by-step explanation:
The discoveries in China in the 1930s, along with Raymond Dart's discovery in South Africa in 1925, provided new evidence of human evolution that prompted a re-examination of the Piltdown man hoax. Raymond Dart's find, the Taung child skull, showed traits of bipedalism and a mix of ape and human features that challenged existing beliefs about human ancestry. In contrast, the Piltdown man was revealed to be a fraudulent assembly of human and orangutan remains, incongruent with real hominin fossils being discovered.