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2009
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December
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- Nelson Mandela was South Africa's first black pres...
- To become a liquid, hydrogen must be cooled to a t...
- Rockets were first invented in the early 1200s by ...
- Louis Braille got the idea for Braille from night-...
- When air confined to a cylinder is suddenly compre...
- In an internal-combustion engine, a mist of liquid...
- The first practical steam engine was invented in 1...
- Nearly 1 third of Tanzania is set aside for nation...
- The capital of the Democratic Republic of Congo, K...
- Egypt was the first Arab nation to make peace with...
- Chemical energy is stored in the bonds that hold m...
- Most deserts receive less than 10 inches of rainfa...
- To find out what your weight would be on the moon,...
- Your body has 100 oil glands and 700 sweat glands ...
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December
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