Evolution could prove that. Primates, as in our ape brothers, tended to have more elaborate bone structures. they used to have a full chest plate of bone which turned into ribs, then that slowly got smaller as evolution weeded out un-needed organs/parts.
Scientific fact cannot be wrong, because its fact. Granted, if for some reason down the road, we found the earth rotated around a small piece of metal that orbits the sun, and not the sun itself, thats a mistake.