The other day Rob and I had a conversation that went something like: Me: What’s a word for something that never existed and is extinct?Rob: Mythical?Me: I mean like a Brontosaurus. Yes I know that the Brontosaurus continues to exist as the Apatasaurus, but there was something awesome about the huge vegetarian dinosaur with the long neck and tail and the tiny head named “thunder lizard.” Who could prefer the name “deceptive lizard” over “thunder lizard”? And don’t forget that when…