…bioethicists and other scientists have expressed their concern that creating interspecies embryos could blur the ethical line between what is human and what is not…

I don’t really have a particular stance on this issue, and I certainly don’t want to make it seem as though real-world biochemistry and evil cartoon alchemy were the same thing, but whenever I hear the word “chimera,” this is the image that jumps readily to mind, and boy, is it ever unsettling.