Lars Onsager

Onsager was a mathematical chemist who won the Nobel prize for chemistry for his general theory of chemical systems near equilibrium. This includes Onsager symmetry, and the principle that a state out of equilibrium returns to equilibrium under the same laws of dynamics as if it were a spontaneous fluctuation. He is also famous among physicists for solving the Ising model in closed form. This great achievement does not appear in his biography.