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The first Chinese compasses were pieces of a magnetic mineral called lodestone.
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These boats were powered by humans unlike the previus ones made by romans whos were powered by oxen.
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The earliest Chinese paper was probably made from hemp and then the bark of the mulberry tree.
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The new Chinese bridge used arches that were a smaller part, or segment, of a circle.
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The Chinese invented a technique called woodblock printing.
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For several thousand years, tea—made by letting tea leaves steep in boiling water—was drunk mostly as medicine.
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Gunpowder was invented by achamists who were trying to a mixture that allows peple to live forever.
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This was the first weapon that used gunpowder.
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Rockets were powered by a black powder made of saltpeter, charcoal, and sulfur.
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