10 things we didn't know last week

Man holding magnifying glass over his nose

1. Nasa employs a "chief sniffer" who smells materials and components before they are used in space.

Find out more (Daily Telegraph)

2. The most tweeted moment of all time came when Japanese TV screened a classic anime film.

Find out more (Slate)

3. Birds are aware of speed limits on roads.

Find out more (New Scientist)

4. Toilet users in Shenzhen, China, can be fined if they fail to urinate accurately.

Find out more

5. Polyamorous people have invented a word to indicate the opposite feeling of jealousy - compersion.

Find out more

6. Volcanoes in New Zealand once were warriors, believe the Maori, who also regard these mountains as ancestors.

Find out more

7. US Supreme Court justices use ivory paper memos rather than emails.

Find out more (AP)

8. Donkeys in Kenya's Rift Valley take "annual leave" from their owners.

Find out more

9. Wolves howl more when they lose a close friend.

Find out more

10. People shown silent videos of piano competitions can pick out the winners more often than those who are also played the music.

Find out more

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