10 things we didn't know last week
20:21 UK time, Friday, 26 November 2010
1. Fish shrink in winter.
2. A elephant's cracked tusk requires at least 47 tubes of resin to fill it.
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3. North and South Korea have technically been at war for decades, because no peace treaty was signed in 1953.
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4. The Shard was first designed on the back of a napkin.
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5. The number of schools teaching cheerleading is triple the number that teach judo.
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6. A cup of coffee combined with a 20-minute nap will double the caffeine effect.
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7. Donald Trump's hair is real.
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8. One in four people with HIV in the UK is unaware they have it.
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9. The US president has the power to shut down key computer systems in that country.
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10. Turkey tycoon Bernard Matthews started his business with 20 eggs and a second-hand incubator.
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Seen 10 things? . Thanks to Vic Barton-Walderstadt for this week's picture of 10 posts.
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