"Oh, ah, when you travel by plane, you often cross multiple time zones. Beijing is seven hours ahead of London, so your body's sense of time gets very confused and it can be hard to adjust to when it's daytime where you arrive but your body thinks it's the middle of the night."

Not pleasant. He's glad he didn't have to do it more for business.

"Possibly a bone or something. There's also fossil footprints. Dinosaurs are the most impressive."