We all have our off days. Why should Evolution be any different? Maybe Evolution got carried away with an idea that was just a little too crazy--like having the Regal Horned Lizard defend itself by shooting three-foot streams of blood from its eyes. Or maybe Evolution ran out of steam (Memo to Evolution: The Irrawaddy Dolphin looks like a prototype that should have been left on the drawing board). Or maybe Evolution was feeling cheeky--a...