One of the best jokes in all of science fiction posits that dolphins are messing with us. In Douglas Adams’ The Hitchhiker's Guide to the Galaxy, we learn, right before the Earth’s destruction that dolphins are hyper-intelligent, and send humanity one last message before departing our planet: So long and thanks for all the fish. The problem is, of course, that regular folks didn’t get the message because we don’t have any technology to communicate with whales, dolphins, or other sea creatures with very large brains. At least not yet.
