Anyone can be a fossil hunter. Amateur enthusiasts and professional palaeontologists are joining forces, unearthing secrets from a time when dinosaurs walked the land. What they are finding is changing what we know about evolution in Wales. Cindy Howells looks after the National Museum of Wales's growing collection of dinosaur fossils, and when she receives a message from a mother and daughter who think they have discovered dinosaur footprints whilst walking on a beach, she joins them to investigate. Have they really stumbled across something that will rock the world of palaeontology in Wales?