The "mermaid syndrome"

OK, so there's actually a mutation that occurs once out of every 70,000 births (not that uncommon considering the extent of the changes) where a persons legs are fused together and the organs in the lower abdominal cavity "modified" to fit. This mutation is called the "mermaid syndrome".

Wow! That is just crazy. A leftover gene from the past? Or perhaps one waiting for the future? Reminds me of "Galapagos" by Kurt Vonnegut - a book I would heartily recommend.