10 things we didn't know last week

1. Chimpanzees and orangutans swim a form of the breast stroke.

Find out more (New Scientist)

2. Meetings at Amazon start with Jeff Bezos and his executives silently reading six-page memos for up to half an hour.

Find out more (CNN)

3. American children eat five times more magnets than 10 years ago.

Find out more (Smithsonian)

4. Dolphins recognise each other after decades apart.

Find out more (Salon)

5. A dog bowl covered with surgical tape is more effective at catching bedbugs than the market-leading trap.

Find out more

6. Scientists still don't really know how bicycles work.

Find out more (New Statesman)

7. Two million North Koreans now have mobile phones.

Find out more

8. A relative of the piranha can be found swimming off the coast of Sweden.

Find out more (The Local)

9. In parts of north Lincolnshire, a 30-step ladder is known as a "thotty stabber stee".

Find out more

10. The word "get" went out of fashion in books between 1940 and the 1960s.

Find out more (Daily Telegraph)

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