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Between 3300 BC and 1200 BC the Bronze Age was in motion. This is significant because it is when humans worked metal into their tools/weapons for farming and hunting.

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Archimedes measures the density of gold. 

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Archimedes measures the density of gold. 

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Around 246 BC, Archimedes tested two crowns to find the density of gold, later creating the Archimedes’ Principle. This is significant because density could be measured through fluid displacement caused by buoyant force.

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The first sighting of Halley’s Comet dated back to 240 B.C.E., by Chinese astronomers. This is important because it informed scientists of how comets can appear more than once. Halley’s Comet appears once every 76 years; it was last reported in 1986.

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Nicolaus Copernicus shows planets orbiting the sun.

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Nicolaus Copernicus shows planets orbiting the sun.

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In 1543, Nicolaus Copernicus states that planets orbit the sun, also known as the heliocentric theory. This is important because it advances our knowledge of the universe.

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In 1609, Galileo Galilei invented the telescope. This is important because it advances the research of space by locating faraway galaxies, planets, and stars.

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William Harvey shows that the heart pumps blood around the body. 

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William Harvey shows that the heart pumps blood around the body. 

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In 1618, William Harvey studies the circulation of blood. This is significant because he discovered how blood is cycled through the veins and arteries in the body.

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The Dodo Bird became extinct in the 1600s, the last of its species being killed in 1681. This is significant because after humans expanded into Mauritius, it led to extinction caused by humans.

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In 1687, Issac Newton was said to see an apple fall, which led to the discovery of gravity. This is important because we learn how force keeps everything drawn on Earth.

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In 1781, William Herschel discovered Uranus, the seventh planet in the solar system. This is important because it was the first planet to be found through a telescope. It also opened the hunt for unknown planets.

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Edward Jenner vaccinates against smallpox. 

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Edward Jenner vaccinates against smallpox. 

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In 1796, Edward Jenner discovered a vaccine for smallpox by injecting cowpox into a 13-year-old. This is important because the body could become immune, as the virus can be deadly.

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In 1866, Alfred Nobel invented dynamite. This is significant because it could be used to make explosives, and help in mining and building industries.

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In 1898, radium was discovered by Madame Curie. This is important because the element was shown to transmute. It was also used in radiotherapy to destroy cancer cells.

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Frederick Banting produces and patents insulin. 

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Frederick Banting produces and patents insulin. 

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In 1921, Canadian scientist Frederick Banting produced insulin with patents. This is important because the hormone helps lower blood sugar for individuals dealing with diabetes.

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In 1950, the FDA approved birth control pills. This is significant because it is an effective and safe way to stop pregnancy. It also earned women more freedom.

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Watson and Crick discover DNA structure. 

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Watson and Crick discover DNA structure. 

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In 1953, DNA structure was discovered by Watson and Crick. This is significant because researchers were able to study genetics, including disorders, as well as disease paths.