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The Chinese devised a wheel that made one complete turn every 24 hours
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The first Chinese compasses were pieces of a magnetic mineral called lodestone
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Steel was made from iron, but it is brittle than iron and easier to bend into other shapes
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Chinese paper was probably made from hemp and then bark of the mulbarry tree
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Porcelain is made by combining clay with minerals quartz and feldspar
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Paper money was printed with wood blocks. By 1107, Song printers were using many wood blocks each bill
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Accidentally discovered by Chinese alchemist who were trying to find items that would make humans imortal
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Famous artists drew designs that appeared on the back of the cards
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Rockets had spread through much of Asia and into Europe
