In 1979, Neptune became the outermost planet as Pluto moved closer to the Sun.
Back in the days when Pluto was still a planet, Neptune began a 20-year run as the outermost planet in the solar system as Pluto’s elliptical orbit carried it closer in to the Sun.
Learn more at http://www.wired.com/science/discoveries/news/2008/01/dayintech_0121
In 1665, Pierre de Fermat, a French mathematician, died at age 63.
Along with Rene Descartes, Fermat is considered to be one of the fathers of analytic geometry. He is also considered to be one of the founders of probability theory.
Learn more at http://math.about.com/library/blfermatbio.htm
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