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Johannes Gutenberg, 1440, Revolutionized the spread of information and literacy

Hans Lippershey, 1608, Changed our perception of the universe and facilitated numerous astronomical discoveries

Zacharias Janssen, c. 1590, Opened up the world of microbiology

Thomas Newcomen, 1712, Laid the groundwork for the Industrial Revolution

John Harington, 1596, Innovated sanitation and waste disposal

Christiaan Huygens, 1656, Increased the accuracy of timekeeping

Evangelista Torricelli, 1643, Essential for understanding atmospheric pressure and weather prediction

Galileo Galilei, 1593, First device to measure temperature variations

Blaise Pascal, 1642, First successful attempt at a mechanical arithmetic machine

James Hargreaves, 1764, Multiplied the amount of work a single worker could do in spinning thread or yarn

John Kay, 1733, Increased the speed of the weaving process

Jethro Tull, 1701, Improved agricultural productivity by sowing seeds efficiently

Bartolomeo Cristofori, early 18th century, Revolutionized music with dynamic range of sound

Benjamin Franklin, 1752, Demonstrated the electrical nature of lightning and protected buildings from strikes

Benjamin Franklin, c. 1780s, Eyeglasses that allowed correction of vision at two different distances

Denis Papin, 1679, Critical to the development of steam engine and steam digester

John Harrison, 1761, Enabled precise determination of longitude at sea, improving navigation

Montgolfier brothers, 1783, Opened the chapter for human flight

Leon Battista Alberti, 1450, Allowed the measurement of wind speed