Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

He's not Navier, but this man and Stokes name a diffusion equation that models the flow of spherical particles through liquids with low Reynolds numbers. This man, Podolski, and Rosen name a thought experiment where photons are fired at a half silvered mirror. This man's field(*) equations measure the evolution of gravity in four dimensional Minkowski space. Along with Bose, this man names a state of matter composed of only bosons. For 10 points, name this man who solved Brownian motion, discovered the photoelectric effect, and came up with the equation E=mc2.
Science