What is the world's largest fish?
The harmless whale shark holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.
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- What is the Mohs hardness scale?
“A 1–10 scale of mineral hardness created by Friedrich Mohs in 1812, running from talc (1) to diamond (10). It's based on which mineral can scratch which.”
Reference: Encyclopaedia Britannica
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