10 things we didn't know last week

Image copyright Science Photo Library

1. Olive oil and baking powder are rubbed onto parts of the Sydney Opera House in order to maintain it.

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2. South Korean soap operas are popular in Cuba.

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3. A porcupine can fight off a pride of lions.

Find out more (Science Alert)

4. Bats jam rivals' senses in the race for food by sabotaging their sound signals.

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5. Iran publishes three times more books than all Arab nations combined.

Find out more (Economist)

6. Islamic State's supposed women's wing has launched an online recipe service for jihadist wives. Millet balls are said to go well with coffee in between battles.

Find out more (The Times)

7. Taylor Swift sold more albums in seven days than the combined total of numbers two to 107 on the Billboard chart.

Find out more (New York Times)

8. Happiness nosedives as you hit middle age, but only if you live in the affluent West.

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8. Female tilapia fish can tell how dominant a male is by smelling his pee.

Find out more (National Geographic)

9. The most common culprits for mistaken UFO sightings in France are Chinese lanterns.

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10. Columnist Lucy Kellaway prints out her draft pieces in Comic Sans to try and detect typos.

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