Dinosaurs first appeared on earth nearly 250 million years ago and survived until a mass extinction event around 65 million years ago. This means that they were dominant animals on the planet for over 150 million years – far longer than human beings. Most scientists believe that the mass extinction of the dinosaurs was caused by a meteor landing on earth.

One of the most popular items in the British Museum in London is the Rosetta Stone. It is rather unremarkable. It is the height of a child, cracked at the edges, lacking colour, and with inscriptions on only one side. There is little beauty in it, and the inscriptions are boring decrees - yet it is maybe one of the most famous stones in the world. For over 20 years it became the focus of a race to crack a code of strange pictures and shapes and in doing so uncover the life of Ancient Egypt.