Evolution most certainly DOES get stuck in local maxima: <a href="http:&#x2F;&#x2F;m.youtube.com&#x2F;watch?v=cO1a1Ek-HD0" rel="nofollow">http:&#x2F;&#x2F;m.youtube.com&#x2F;watch?v=cO1a1Ek-HD0</a> . Also, it&#x27;s quite easy for me to imagine an animal like an angel, with arms and wings. Tetrapods only have 4 limbs to work with though. For bats to gain wings they had to lose their front legs.