In my post Why Ann Coulter Thinks Evolution is False, Part Nine, I was making the point that pseudo-scientific creationists like Ann Coulter are quick to leap to hoaxes such as Piltdown Man while ignoring the literal deluge of legitimate hominid fossils. Gunner Sykes left a comment asking, “So, what evidence do you have that Australopithecine fossils are our ancestors?”
Let’s ask a couple questions in a similar vein. What evidence do we have that the background microwave radiation in space is leftover from the Big Bang? What evidence do we have that the time dilation observed in accelerated subatomic particles is the result of relativity?
You’re missing the forest for the trees, Gunner. The theory of evolution says that man descended from apelike ancestors. If that’s true, we should expect to find species that appear transitional between apelike creatures and man. Behold, we find the many hominids of the Australopithecus and Homo genus. Not only are they more human-like than apes, but they grow progressively more and more like modern humans as they get more recent. If this is not evidence of transition, then what would be transitional between an ape and human? This is exactly what evolution predicts should be found. This is how theories are validated; this is the heart of science. The theory makes predictions, the predictions are tested, and if they pan out, the theory reaches the rarefied air of relativity, quantum theory, and yes, evolution.
Of course, a theory as powerful as evolution is not built on a few anecdotal snippets like this. A couple of fossils are not going to prove the theory incorrect or correct. The presence of transitional species between man and apelike ancestors is one little piece of the story of human evolution. If the theory of evolution is true, we should also find other sorts of evidence of man’s evolutionary past.
How about genetic evidence? Chimpanzees (and our other primate relatives) have twenty-four pairs of chromosomes. Humans have twenty-three. If evolution is true and we share common ancestry with modern apes, this means that sometime in the history of Homo sapiens, two of our chromosomes must have combined (folded) together. If this folded chromosome couldn’t be found, then the current idea of human evolution would be completely destroyed forever. But it was found, exactly as was predicted by theory.
Or vestigial evidence? Humans have a coccyx (the remnants of a tail), an appendix (useful for herbivores but not so much for the omnivores we’ve become), yolk sacs when we are embryos (empty yolk sacs since as placental mammals, we don’t need them) and muscles in our head that once were used to move our ears. Human infants – like chimpanzee infants – have the grasp reflex. We have wisdom teeth, which cause so many people trouble because they are left over from when our jaws were larger and used for grinding more plant matter. We also have innate lower back and knee problems – indicative of a species that has only recently began walking upright. Human childbirth is the most dangerous and painful of all the mammals because our cranial size has increased so quickly and our awkward narrow pelvises are needed for upright locomotion. Hemorrhoids, a uniquely human experience and a consequence of walking upright, are another example of the shoddy “design” and tradeoffs the theory of evolution predicts.
The evidence is all there for anyone to see. It’s not shoddy, it’s not iffy, and there is definitely not a lack of it.