"By the time we leave, I'll make sure that you're a geology expert!" She promises, and it wasn't like it would be hard with Ben's natural aptitude and memory. Sadie tosses in some interesting facts of her own as they go around, hypothesising the most likely preservation conditions for the more delicate specimens.

"See that Archaeopteryx? That's one of the Solnhofen specimens. The feathers were preserved because the lagoon was nearly devoid of oxygen, and fine sediment would drift in from the Tethys Sea, preserving the smallest details. I'd love to go, they have a fantastic fossil museum with some amazing specimens!"

Sadie grins, glad that Ben seems to like the exhibit so far. "This was my favourite thing in the museum when I was younger, Mum and Dad always had to drag me away." She shakes her head, before pulling out the map. "So which section should we do next, the Mammals or the rocks?"