Back in 2008, I read Neil Shubin’s book, “Your Inner Fish.” I posted on it here. PBS has worked with Shubin to present a documentary that covers and expands on Shubin’s work. What a great compliment to Neil deGrasse Tyson’s Cosmos. You won’t want to miss this. It’s a story about plasticity, about how your body is bursting with evidence of your animal ancestors. Another reason to watch this: Shubin’s enthusiasm is contagious.