What do megamouth sharks, hoan kiem turtles, and the giant squid all have in common. Sixty years ago, scientists would have told you that none of them exist. As I read the Houston Chronicle’s front page report on Tuesday that a giant squid had been fished up by fisherman off the coast of Louisiana, I imagine that I felt more excited than most people. Yes, I knew that the animal exists because the mysterious creature was proven to exist in 1954, when the first giant squid was captured.