Charles Darwin was quite aware that the sudden appearance of animals in the fossil record poses a major problem for his theory, but he hoped that this problem was due only to our insufficient knowledge of an incomplete fossil record, and therefore will dissolve over time with future research. However, 150 years of paleontological exploration after Darwin has made the problem far worse: not for nothing is it called the Cambrian Explosion. All attempts to explain this problem away have failed (Meyer 2013), including the still beloved artifact hypothesis (Bechly 2020).
Ahem ! He was wrong … dead wrong … even his wife warned him !