Henri Poincaré

Henri Poincaré biography in outline: French mathematician born c.  BC (), died c. BC.

Henri Poincaré quote: "The scientist does not study nature because it is useful: he studies it because he delights in it, and he delights in it is because it is beautiful. If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living. Of course I do not here speak of that beauty that strikes the senses, the beauty of qualities and appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty, which comes from the harmonious order of the parts and which a pure intelligence can grasp."

Henri Poincaré Biography: Sources

This Henri Poincaré biography will focus on the main philosophical and scientific views of Henri Poincaré, for a broader and more detailed account you should refer to a standard biographical dictionary: 

A longer Henri Poincaré biography can be found in Encyclopaedia Britannica, with more scientific details in Big Bang by Simon Singh.