Evolution keeps making crabs. In fact, it's happened so often that there's a special scientific term for an organism turning crab-like: carcinization. But how many times has it happened, and why? When did the very first crab originate? What about all the times crabs have been unmade? And does all this mean that we, too, will eventually become crabs? In this episode, host Emily Kwong chats with Javier Luque about crabs, carcinization and change. Want more paleontological science stories? Email us at [email protected] — we'd love to hear your thoughts! Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy