@ bold: do you have any evidence for that claim?
Because , personally i dont see much difference in the fundamental properties of the bones here:
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Now, obviously not every ancestor homo that ever lived was going to leave fossils once it died, but the ones that did paint a very clear picture of the
direction in which the evolution progressed, i.e quadroped to bipedalism, large jawline to small, gradual changes towards larger and larger brain masses(frontal and parietal bone). So forgive me for not being too mystified, we don't know the EXACT route, but the general direction is in no doubt.
And speaking of DNA, heres a quick summary of a very interesting experiment:
Every living thing has DNA, and a sample of DNA from 6 different living things (say, bannana, human, chimp, dog,horse and pig) are kept separate from each other and subsequently 'melted'. DNA is like a double helix, so those 'strands' or lines connecting it to itself are broken via the melting. The melted DNA's are shuffled(mixed), and left to cool down. And guess what?
Every single individual strand of DNA from each living thing is able to bond with the strands from the others, not just that but the strength of the bond is stronger with the more closely related living things.
So, in other words, human DNA can bond and form a helix with bannana DNA, but form a much stronger bond with horse and pig DNA, and the strongest bond with chimp DNA(though not as strong as the bond with its own human DNA strand, obviously). Thus proving chimpanzees as our closest relatives.