For example, in 1990, Richard Leakey himself said that, "If pressed about man's ancestry, I would have to unequivocally say that all we have is a huge question mark.
Three months before her death, she said in an interview, "All these trees of life with their branches of our ancestors, that's a lot of nonsense." Biases are of course part of human nature. Dawson found a mandible and a small piece of a skull in a gravel pit near Piltdown England.
The jawbone was ape-like but the teeth had human characteristics. These two specimens were combined to form dawn man, which was supposedly 500,000 years old.
However, the whole thing turned out to be an elaborate hoax.
The skull was indeed human (about 500 years old) but the jaw was that of a modern ape whose teeth had been filed to look like human wear.
Taking isolated similarities by themselves, the theory of evolution appears to be quite reasonable... However, it seems that too much weight has been placed on similarities without questioning the differences.