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Two French brothers filled a giant paper bag with hot air — and people flew for the very first time.
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In the 1780s, two brothers named Joseph and Étienne Montgolfier ran a paper factory in France. They noticed that hot air made paper bags float up to the ceiling. What if they made a really big bag — big enough to lift a person?
They sewed together a huge balloon made of paper and cloth, and filled it with hot air from a fire. Hot air is lighter than cold air, so the balloon rose into the sky. First they tested it with a sheep, a duck and a rooster as passengers, to make sure it was safe.
Then, on November 21, 1783, two brave men — Pilâtre de Rozier and the Marquis d'Arlandes — climbed into a basket under the balloon in Paris and floated over the rooftops for about 25 minutes. It was the first time humans had ever flown.
The first passengers in a hot air balloon were a sheep, a duck and a rooster — they flew before any human did.
What made the Montgolfier balloon rise into the sky?