It all starts when Annabelle and Harry decide to change their library books in the school library. There is a loud noise and the ground in the corridor begins to shake. It feels like the school is falling down. When the dust settles the children discover the hall floor has collapsed. Below they find a cave. The children are thrilled to think they are the first people to ever set foot in the cave. Then the most incredible discovery leads them to think this may not be the case. Join Annabelle and Harry the DNA Detectives on their adventure as they meet archaeologists and scientists who help them uncover the mysteries of the Stone Age. Discover fascinating details about cave paintings extracting DNA from ancient bones finding out how tartar from ancient teeth can tell us what someone looked like what they ate and even what made them ill. Can you help the DNA Detectives solve the Stone Age mystery