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Who was Euclid?

Euclid (lived c. 300 B.C.) is remembered as one of the greatest mathematicians in the world. Historians believe that Euclid probably studied at Athens under students of Greek philosopher Plato (c. 428–348 or 347 B.C.) before he founded a school of mathematics in Alexandria, Egypt, during the reign of Ptolemy I (?–283 B.C.). Euclid is best known for his work titled Elements, a thirteen-volume textbook on the principles of mathematics. They include treatises on plane geometry (a branch of geometry dealing with plane figures), proportion (the relationship among parts), astronomy (the study of stars, planets, and heavenly bodies), and music. Although no one knows if all of the work in Elements was Euclid's or if he compiled the mathematical knowledge of his colleagues (such as Eudoxus), the work formed an important part of mathematics for 2,000 years. Even today, modified versions of the first few books of...

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1. Mathematics And Astronomy
   1. Who was Pythagoras?
   2. Who was Euclid?
   3. What was Nicholas Copernicus's contribution to knowledge of the universe?
   4. What were Galileo's contributions to science and mathematics?
   5. Why was Johannes Kepler important to modern astronomy?
   6. When did Halley's Comet first appear?
   7. Did Isaac Newton really discover the law of gravitation when an apple fell from a tree and hit him on the head?
   8. Who invented calculus?
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2. Biology
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   2. How did Charles Darwin develop the theory of evolution?
   3. Who are Louis and Mary Leakey and what did they discover?
   4. When was the structure of DNA discovered?
   5. What is cloning?
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   2. Why is the equation E=mc2 significant?
   3. Why did Albert Einstein want the United States to develop the atomic bomb?
   4. What was Enrico Fermi's contribution to the understanding of nuclear power?
   5. Why was J. Robert Oppenheimer accused of being disloyal to the United States?
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   15. Who invented the telegraph?
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