iif mice didn't exist, we wouldn't be asking that question. Mice existing is a prerequisite for asking why the exist. In short, they exist because that was one of the populations that survived. If the ancestors of mice did not have surviving offspring and some other group did, perhaps you would be asking the same question about a different animal that in our world has never existed.That's my point. How do mice exist at all?
Sure, but why do they exist? According to evolution mice exist because of millions of uninterrupted, successful changes over millions of years. How likely is that?
Asking why a mouse exists is exactly like asking why a smulplumph exists. The only difference is that the mouse happens to exist. If we were to travel back in time and let pre-mouse ancestors evolve all over again, we might instead end up with the smulplumph.
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