From Egypt to France and on to Britain, Marc decodes the story of the Rosetta Stone: how it ended up in London, who really took it, where it belongs, and why it remains one of the British Museum's most contested treasures.

The largest meteorite of its kind, the Cranbourne Meteorite now sits tucked away in the British Natural History Museum's gift shop. But how did it get there and should it be returned back to Australia where it landed?