- The smallest dog is the Chihuahua.
- Dirty snow melts quicker than clean snow.
- Alan Turing was a British mathematician and computer scientist who cracked German ciphers (codes) in the Second World War, contributed to mathematical logic and played an important role in the development of algorithms, artificial intelligence and the modern computer..
- 'orology' is the study of mountains.
- 1 gigayear = 1,000,000,000,000 years.
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