- The Earth weighs 6,588,000,000,000,000,000 tons.
- Chinese mathematics developed around the 11th century BC and included important concepts related to negative numbers, decimals, algebra and geometry..
- The average elephant produces 22kg (50 pounds) of dunn each day.
- Cars were first started with ignition keys in 1949.
- Shrimps are all born male but slowly grow into females.
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