Originally posted by Jorge
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You object that it couldn't happen, yet we already make it happen with selective breeding. Is it inconceivable that the same thing could happen with wolves in the wild? It is just breeding, not macro evolution. A wolf who can run slightly faster might survive longer. After a while the slower wolves would die off and only the faster would remain. This could keep going on until some physical barrier was reached (such as your heart thing) that would ultimately limit the speed. Or perhaps after a while the new wolves would have offspring with stronger hearts. Those who were faster with stronger hearts would survive and those who did not would die off. It is just breeding useful traits that help survival.
Your objections are indeed silly.
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