Have you ever heard of a tongue twister? Tongue twisters are English sentences that are designed to be hard to say. Try saying this five times fast: She sells seashells on the seashore. Any native English speaker will have learned this tongue twister as a child, but what many people don’t know is that it is based on a real person. Who is this woman who sells seashells on the seashore? It’s Mary Anning, the unsung hero of modern Paleontology.