Mid- 1st century AD, Gun powder - China
1440, Printing Press - Johannis Gutenburg
1543, Heliocentric universe - Nicolaus Copernious
1551, Stem Engine & Pressure Cooker - Denis Papin
1609, Galilean Telescope - Galileo Galilei
1665, Discovery of Cells - Robert Hooke
1674, First Microscope - Anton van Leeuwenhoek
1684, Calculus - Gottfried Leibniz & Isaac Newton
1687, Gravity & Laws of Motion - Isaac Newton
1724, Mercury Thermometer - Daniel Fahrenheit
1769, Automobile - Nicolas-Joseph Cugnot
1790, Aerosol - Erik Rotheim
1793, Cotton Gin - Eli Whitney
1796, Small Pox Vaccine - Edward Jenner
1807, Atomic Theory - John Dalton
1822, Photograph - Joseph Nicephore Niepce
1829, Aspirin - Arthur Eichengrun
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