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100 BCE
Ptolemy's Theory
Ptolemy, an astronomer, believed that the earth was the center of the universe and that the suns and planets moved around Earth. He called this the geocentric theory. -
Sep 20, 1200
Roger Bacon's Theory
Roger Bacon, an English philosopher and scientist, was one of the first people to use scientific exploration instead of faithful acceptance. After people heard about this theory, they began to question human nature and were not satisfied with just their beliefs. This was called the Spirit of the Renaissance. -
Period: Sep 20, 1200 to
Scientific Revolution Timespan
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Jan 10, 1500
Copernicus's New Theory
Scientist Nicolas Copernicus believed that his new theory, the heliocentric theory, was better than Ptolemy's theory because he believed that the sun was the center of the universe. Copernicus soon realized that his theory explained many of the facts that they knew then about astronomy. -
Nov 30, 1500
Antoni van Leeuwenhoek
Antoni used the microscope and discovered bacteria, which he called animalcules. He studied them and wrote about a whole range of these new tiny life forms that had never been seen before. -
Sep 21, 1543
Copernicus's Theory Published
When Copernicus released his theory, no one believed him because it denied what people thought they knew. -
Sep 21, 1543
Andreas Vesalius
Vesalius believed that the human body was very complicated. Vesalius studied on his own and published a book about the human body with incredible pictures and drawings. -
Johannes Kepler
Kepler was a mathematician who helped to prove Copernicus's theory. He later realized that some of Copernicus's theory was wrong, but managed to prove it was right with the help of Galilei. -
Francis Bacon
Francis Bacon had a new theory that you can only prove assumptions correct if you had done an experiment. He later published a book about his theory. -
Descartes and his Law of Refraction
In Descartes point of view, all fields of science were connected and that they should be studied together. Descartes created a mathematical description of light refraction. Most of his work challenged many teachings taught by the church. Because of this, he had to live in the Protestant kingdom of Sweden, where he died in 1620. -
Galileo's Theory Published
After Galileo published his ideas to the public, many people didn't believe him because they thought it went against the bible and some still believed in Ptolemy's theory. They also tried to say his theory was untrue because of their belief that heavy objects fall faster than lighter ones, but Galileo proved this wrong as well. -
René Descartes
René Descartes was a leader of the Scientific Revolution and believed that you can prove something without having facts to back it up. -
Robert Boyle
Boyle helped to start the modern science of chemistry. Boyle showed that temperature and pressure affect the space that a gas occupies. -
Isaac Newton
Isaac Newton wrote a book about Kepler´s, Copernicus´s, and Galileo´s theory´s and proved that planets moved around the earth, but he could not prove why. -
Antoine Lavoisier
Lavoisier, a French scientist, later came up with the name of oxygen. -
Lavoisier - Continued
Lavoisier came up with the conservation of matter and proved that fire was created using oxygen. -
Joseph Priestly
Priestly discovered the oxygen element.