December 27
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1571: Mathematician, astronomer, and astrologer Johannes Kepler born. He will discover laws of planetary motion.
1773: Engineer George Cayley born. He will do pioneering work in aeronautics, investigating and codifying the dynamics of flight.
1923: Engineer Gustave Eiffel dies. He designed the world-famous Eiffel Tower.
1924: Jean Bartik born. She will be one of the original programmers for the ENIAC computer.