This was a great book. I finished it in only 3 days which is quick for me. The illustrations are wonderful and give a good beginning grasp on the concept that the structures in the bodies of multicellular organisms are just variations on a theme. I'd like to learn more about embryonic development and I may look up some of his sources in the references section at the end of the book to learn more of the details. I'm specifically interested in vision development and opsin gene expression. I also would have liked it if Neil had explained how some of the structures that attach limbs to the spine developed. Is the pelvis just a large mutated vertebrae? What about the shoulders? Are the shoulders built in a similar way as the pelvis or are they built in a different manner. Shoulder bones and pelvis don't look much alike to me. And what about ribs? What's their story? Are they just extensions of the vertebrae or do they share some developmental characteristics of more external structures like limbs? There is an interview in the March issue of Discover magazine with Sean Carroll where he touches on the cellular machinery that has been conserved over evolution and is expressed similarly in the development of fruit fly limbs and eyes and vertebrate limbs and eyes (evo devo). In the same issue of Discover Neil H. Shubin's work on Tiktaalik roseae is mentioned in the article "Galapagos Next". I think even non-science people might enjoy reading this book.
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