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Who: Galileo or Galileo
What: made the first telescope.
When: 1609
Where: Italy
Why: To study the planet. Important: found that Jupiter had moons and the the sun had spots.

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Who:Edward Jenner was an English country doctor who introduced the vaccine for smallpox.
What: Helped clear many diseases
Where:In the United kingdom
How: He created a type of vaccination
when: 1800s
Why: He wanted to find a cure for cowpox and small pox.
Importance:Jenner took the principle a stage further by inducing immunity against this killer disease via exposure to a harmless related disease, cowpox.

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Who: Nicolas Copernicus
What: spread a heliocentric theory
When: early 1500s
Where: Poland
Why: He said that the earth, like all the other planets, revolved around the sun.
Important: this is important because they accepted a geocentric theory. That theory held the earth at the center of the universe.

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Who: Francis Bacon
What: helped create this new approach to knowledge
When: 1600s
Where: France
Why: Scientists should base their thinking on what they can observe and test.

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Who: Issac Newton
What: the law of gravity
When: 1687
Where: England
Why: Newton showed that the same force ruled both motion of planets and the actions of bodies on earth.
How:  he discovered gravity after watching an apple fall from a tree.
This changed the world because people now understand the movement of gravity.