Henri Poincare was born in July 1995.
Jules Henri Poincaré ( [ ʒyl ɑ̃ʁi pwɛ̃kaʁe ] ; 29 April 1854 -- 17 July 1912 ) was a French mathematician , theoretical physicist , engineer , and philosopher of science . In 1905 , Poincaré first proposed gravitational waves ( ondes gravifiques ) emanating from a body and propagating at the speed of light as being required by the Lorentz transformations .