More From The BBC's Things We Didn't Know Last Year...
6. Carrots used to be purple.
14. Brain tumours can be diagnosed by a handshake.
17. For the first time in US history, more than one in every 100 American adults is behind bars.
18. 23% of plastic bags used in the UK are from Tesco.
22. Toasters are banned in Cuba.
25. Lions were kept in the Tower of London in the 14th century.
26. Up to one quarter of the sand on shorelines can be composed of plastic particles
33. A severed finger tip can grow back naturally.
45. Pigs can suffer from mysophobia, a fear of dirt.
50. The Royal Family costs the equivalent of 66p per person in the UK.
53. Pears sink while apples float.
70. You can dive from 35ft into 12in of water - and only suffer bruising (with a lot of training).
72. Portraits of famous people often look like the painter instead.
