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        Part of It's Okay To Be Smart
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        You Are An Upside-Down Lobster | It's Okay to Be Smart | PBS Digital Studios

        Our bodies are mirror images of lobsters and other arthropods from back to belly. We've know since the early 19th century that our guts and nervous systems are inverted from theirs, but only recently has molecular biology shown us why. Here's the evolutionary tale about a worm doing the backstroke and why your guts are on your front. This is part 2 of 3 in my series about how our bodies evolved to look like they do.

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