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 long will the astronauts' footprints last on the Moon?
“Because the Moon has no wind or water to erode them, the footprints left by Apollo astronauts could last for millions of years.”
Reference: NASA
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When did humans first land on the Moon?
Humans first landed on the Moon on July 20, 1969, when Apollo 11 astronauts Neil Armstrong and Buzz Aldrin touched down while Michael Collins orbited above in the command module.
Who invented pasteurization?
French scientist Louis Pasteur developed pasteurization in the 1860s, which kills harmful microbes by heating liquids like milk and wine.