Some people say that humans and chimps having over 90% the same DNA is proof that we have a common ancestor. Chimps, Humans 96 Percent the Same, Gene Study Finds
Also, according to this article from an anti-creationist site (Creationist Arguments: Neandertals), neanderthals were a different species from humans, and they could not have been humans with rickets. Here are their arguments as to why Nenderthals could not have been humans, as many creationists claim.
I have studied the arguments that people make against evolution, but these two arguments in favor of evolution, I find very hard to debunk.
Also, according to this article from an anti-creationist site (Creationist Arguments: Neandertals), neanderthals were a different species from humans, and they could not have been humans with rickets. Here are their arguments as to why Nenderthals could not have been humans, as many creationists claim.
Rickets does not produce a Neandertal, or Homo erectus morphology; it is clear from many sources (Reader 1981; Tattersall 1995) that the original Neandertal skeleton was unlike any previously known, even in a century in which rickets was a common disease.
Evidence of rickets is easily detectable, especially on the growing ends of the long bones of the body. Radiology courses routinely teach the symptoms. It has never (so far as I know) been detected in Neandertals or Homo erectus.
Even Virchow did not claim rickets as a sole cause. Virchow in 1872 decided that the first Neandertal Man fossil had had rickets in childhood, head injuries in middle age, and chronic arthritis in old age. A whole population of such people strains credibility, to say the least, although Lubenow says that this diagnosis "is as valid today as when [Virchow] first made it".
The long bones of Neandertals, like those of rickets victims, are often more curved than normal, but rickets causes a sideways curvature of the femur, while Neandertal femurs curve backwards (Klein 1989).
I have studied the arguments that people make against evolution, but these two arguments in favor of evolution, I find very hard to debunk.