Sure, humans and fish both share backbones and nerve codes. That’s no surprise to anyone. In fact, humans also share genes with bananas and bacteria. That organisms share genes or structural parts does not necessarily reflect common ancestry, because it could indicate that they were built upon a common body plan. After all, it’s a good design principle to re-use parts that work in different designs—this is exactly why mechanical engineers put wheels on both cars and airplanes, or why technology designers put keyboards on both computers and cell phones. That different organisms share some of the same parts could easily reflect common design rather than common descent. — Stephen C. Meyer (From, Darwin’s Doubt: An Interview with Stephen C. Meyer – Justin Taylor)


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