100 things we didn't know this time last year

14. It's possible for a human to blow up balloons via the ear. A 55-year-old factory worker from China reportedly discovered 20 years ago that air leaked from his ears, and he can now inflate balloons and blow out candles.

19. The = sign was invented by 16th Century Welsh mathematician Robert Recorde, who was fed up with writing "is equal to" in his equations. He chose the two lines because "noe 2 thynges can be moare equalle".

52. You're 10 times more likely to be bitten by a human than a rat.

57. The man who was the voice of one of the original Daleks, Roy Skelton, also did the voices for George and Zippy in Rainbow.

83. Britain produces 700 regional cheeses, more even than France.

98. Nettles growing on land where bodies are buried will reach a foot higher than those growing elsewhere.
100 things we didn't know this time last year