How did the Louisiana Purchase change the size of the US?
In 1803 the US bought the Louisiana Territory from France for about $15 million. The deal roughly doubled the size of the country.
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- How accurately is the Great Pyramid aligned?
“The Great Pyramid's sides are aligned almost exactly with true north, south, east, and west, a stunning feat of precision for ancient engineers.”
Reference: Smithsonian Magazine
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Who was the Great Pyramid of Giza built for?
The Great Pyramid of Giza was built for the pharaoh Khufu around 2560 BC.
Did the Wright brothers build a wind tunnel?
The Wright brothers built their own wind tunnel in 1901 to test hundreds of wing shapes, collecting data that was more accurate than what scientists had at the time.