10 things we didn't know last week
10:44 UK time, Friday, 23 September 2011
Snippets from the week's news, sliced, diced and processed for your convenience.
1. MI5 used to have special kettles kept solely for steaming open envelopes.
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2. Only one in every 250 million births is a case of conjoined twins.
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3. Bill Clinton was invited to appear on Dancing with the Stars, the US version of Strictly Come Dancing.
4. Penguins find their family members by sniffing them out.
5. The world's smallest aquarium contains just two teaspoons of water.
6. Elephants can paint.
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7. Red-haired donors are being turned away by the world's largest sperm bank because there is a lack of demand for their "product".
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8. Facebook hosts 4% of all photos ever taken.
9. Yawning cools down the brain.
10. Crows can find food with the aid of mirrors.
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