10 things we didn't know last week
1. Chimpanzees and orangutans swim a form of the breast stroke.
2. Meetings at Amazon start with Jeff Bezos and his executives silently reading six-page memos for up to half an hour.
3. American children eat five times more magnets than 10 years ago.
4. Dolphins recognise each other after decades apart.
5. A dog bowl covered with surgical tape is more effective at catching bedbugs than the market-leading trap.
6. Scientists still don't really know how bicycles work.
7. Two million North Koreans now have mobile phones.
8. A relative of the piranha can be found swimming off the coast of Sweden.
9. In parts of north Lincolnshire, a 30-step ladder is known as a "thotty stabber stee".
10. The word "get" went out of fashion in books between 1940 and the 1960s.
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