Siblings share 50% of their DNA. Then scientists say we have 1-4% Neanderthal DNA, but say we are 99% related to chimps. Then there is the fact that we share 60% of our DNA with bananas.
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Evolution is lazy and most biological functions are roughly similar to each other. Sure, we share 99.6% of our genome with pan bonobos; but that .4% makes a world of difference. Thing is, there isn’t *that* much difference between bonobos and humans. The heart, digestive system, kidneys, brain, eyes, ears, etc all do basically the same thing. Evolution isn’t going to come up with novel solutions for every animal. We see a lot of differences between a Chevy Tahoe and a Prius because we are tuned to it. Realistically they are dramatically similar. The wheels do the same thing, the steering wheel does the same thing, etc. Change a couple of parts and it is totally different; but it isn’t a brand new invention every time.
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