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The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
Buzz Aldrin (/ ˈ ɔː l d r ɪ n /; born Edwin Eugene Aldrin Jr.; January 20, 1930) is an American former astronaut, engineer and fighter pilot.He made three spacewalks as pilot of the 1966 Gemini 12 mission, and was the Lunar Module Eagle pilot on the 1969 Apollo 11 mission.
Pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. Learn about its history, properties, and applications in this Wikipedia article.
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