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In the second centuray builders made ships safer by making ships with air water tight compartments.
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The compass was made to origanyaly help make building but then someone took it on a ship and improved sailing
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The paddlewheel boat was invented to help people get across rivers or lakes fater without taking bridges, people would run on treadmills moving the boat.
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The invention of paper started the idea of printing, making it easyier to copy books using wooden blocks with letters on them.
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Tea is a hot beverage made from boiling leaves in water that is still popular today in some cultures
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Gun powder was acidentally invented by alchemists trying to find the cure to a longer life. Gun powder was used for weapons like flamethrowers or artilarry shells.
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wood block printers were used to copy the cards on thick paper and artists drew there designs on the back of the cards.
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Movable type is the system of printing and typography that uses movable components to reproduce the elements of a document
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Rockets were invented in china during the song dynasty. The rockets were powerd by saltpeter, charcoal and sulfer. At first rockets were only used as fire works but then later used as weapons
