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The New Astronomy: Crash Course History of Science #13

Heliocentrism was central to revolution in European astronomy. We’ll follow this idea to its conclusion with Galileo. But before we get there, there are two critical links between Copernicus and Galileo. This is the story of Tycho Brahe and Johannes Kepler… and a violent math duel. [INTRO MUSIC PLAYS] There are a lot of quirky […]

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Neil deGrasse Tyson Biography – Bringing Science to the People

At the age of 9 he knew what he wanted to do with his life, and he never wavered from his goal. Now, he’s one of the world’s most famous scientists. He’s earned the title of “Most Powerful Nerd In The Universe” from National Public Radio and the title of “The World’s Sexiest Astrophysicist” from […]

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Electrical system of the heart | Circulatory system physiology | NCLEX-RN | Khan Academy

here's a diagram of the four chambers of the heart so let's let's name them to get started so we've got the right atrium up here we've got the right ventricle down here we've got the left atrium and the left ventricle so these are the four chambers and blood is going to flow through […]

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