Technically speaking, the Sahara is not the world's largest desert. The Arctic and Antarctic deserts are larger.
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The Sahara has historically alternated between grassland and desert on a 41,000 year cycle. Barring human-driven climate change, it is expected to become green again in around 15,000 years.
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The "Salon", held in Paris, was arguably the world's most important annual art exhibition between 1748 and 1890.
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A "zephyr" is a light wind from the west.
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All people of European or Asian descent have some Neanderthal DNA.
Haha, you were close. Russia is about 9,223,372,036,854,776,000 times bigger than my thumb, plus or minus 2%! But my thumb is a lot smaller than Vatican City.
Most of Antarctica is desert, receiving less than 200 mm precipitation per year. Ross Ice Shelf (and West Antarctica generally) receives more precipitation than East Antarctica.