10 things we didn't know before the 34th week of 2010

1. The Tube carries more passengers than the whole of the national rail network.
2. The optimum time to book a flight is eight weeks before departure.
3. The Stig was originally going to be called The Gimp.
4. Milk used to be watered down, then coloured yellow with toxic lead chromate to make it look creamy.
5. It's possible to watch 28,000 films in a lifetime.
6. Sumo wrestlers can't use iPhones because their fingers are too fat.
7. The socks-with-sandals look came from the Romans.
8. Tornados can burn.
9. Putting a cat in a bin is not illegal.
10. Traffic jams can last nine days.

(Borrowed from the BBC)