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the river lock was used to raise and lower boats in the river to make it easer to get on and off of them.
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The printing press was invented by Johannes Gutenberg, around 1440.
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in 1536 the potato was found in peru,south america and was brought backto europe.
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in1665 The first recorded blood transfusion occured. Physician Richard Lower keeps dogs alive by transfusion of blood from other dogs.
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The Great Fire of London swept through the central parts of the English city of London in 1666.
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In 1790, the sewing mechine was invented by Thomas Saint the first sewing machine design. but he did not successfully advertise or market his invention.
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approx 406 million lives saved from this vaccine
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The steam engine was developed over a period of about a hundred years by three British inventors. this is one of the people that helped invent the steam engine Thomas Savery.
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In Medieval England, the Black Death killed 1.5 million people out of an estimated total of 4 million people between 1348 and 1350.The Black Death had a huge impact on society