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Issac Newton proposed that there was a force that attracted all objects to one another. This force was called gravity, and it changes depending on the mass of an object. He discovered gravity while lying under a tree when an apple fell on his head. Newton also came up with the 3 laws of motion and the law of math.

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Francis Bacon is credited with developing the scientific method. The scientific method involves testing hypotheses through experiments. Bacon promoted studies to improve the understanding and control of nature.

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William Harvey published a study to show how blood circulates in the human body. Harvey discovered the relationship of the system of veins and arteries to the contractions of the heart. Harvey's discoveries inspired more studies of blood circulation

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Galileo proved Nicolaus Copernicus's heliocentric theory that the Earth was a planet that orbited the Sun. He published his findings in a book called Starry Messenger. He was later charged with heresy against the church. Galileo stopped his trial and was under house arrest until he died.

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Johannes Kepler discovered that planets orbited in a ellipse shape around the sun. The speed of each planet changes, and the Sun is responsible for that change. He's known for the three Laws of Planetary Motion, which used math to explain how planets move.

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Nicolaus Copernicus developed the heliocentric theory. The heliocentric theory was a theory that all the planets revolved around the sun. This theory went against the church, and after he died, his family published the theory.