Mutations aren't necessarily defects. They can be. Aren't always.
Also we have the DNA for tails and mostly lose them. So why can't the DNA for hands have been there from the start. Do phyla never lose an organ into vestigiality only to regain it later? (This I do not know).
What if all it takes to get hominids is rocks in space with fragments of our DNA surviving in dust and impact?
What we seek to understand is the how.
The why is G-d and Satan.
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