The Egyptians used a weird method to reduce friction by pouring water onto the sand, causing the sand to clump together and make it easier to pull along due to the reason that each individual piece of sand doesn't hold it back. They called this weird technique capillary bridges.
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Air pressure is the weight of the atmosphere pressing down on the earth. It is measured by a barometer in units called millibars. Most barometers use mercury in a glass column, like a thermometer, to measure the change in air pressure.
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Congo River
The Congo River is the most powerful river in Africa. During the rainy season over 50,000 cubic metres (1,800,000 cu ft) of water per second flow into the Atlantic Ocean.
Africa's Nile River is the longest river in the world at 4,135 miles, or 6,650 km long.) That makes the Congo River the ninth-longest in the world.
The Congo Rain Forest is located in central Africa. Spans approximately 1.5 million square miles. World's second largest rain forest. One of the most endangered ecosystems in the world due to commercial logging and expansion of farming.
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The Caning of Charles Sumner, or the Brooks–Sumner Affair, occurred on May 22, 1856, in the United States Senate chamber, when Representative Preston Brooks, a pro-slavery Democrat from South Carolina, used a walking cane to attack Senator Charles Sumner, an abolitionist Republican from Massachusetts, in retaliation for a speech given by Sumner two days earlier in which he fiercely criticized slaveholders, including a relative of Brooks. The beating nearly killed Sumner and it contributed significantly to the country's polarization over the issue of slavery. It has been considered symbolic of the "breakdown of reasoned discourse"[1] and the use of violence that eventually led to the Civil War.
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