10 things we didn't know last week

1. The least common PIN code is 8068.

Find out more (Daily Telegraph)

2. Monogamy evolved to keep baby killers away.

Find out more (New Scientist)

3. The average Frenchman eats only half a baguette a day, compared with almost a whole baguette in 1970 and more than three in 1900.

Find out more (New York Times)

4. When a cat lies on its back it wants its head stroked.

Find out more (the Times)

5. Soap and clean water make children grow taller.

Find out more

6. Bookshop customers are six times more likely to buy romance or cookery titles when they can smell chocolate.

Find out more (The Guardian)

7. A hummingbird's brain accounts for 4.2% of its bodyweight, the highest of any bird.

Find out more (PBS)

8. David Cameron is an Alt-J fan.

Find out more (The Times)

9. Grapes hit by hail stones produce wine that tastes corked.

Find out more (Financial Times)

10. Fish with interesting surroundings are brainier.

Find out more (The Times)

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