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.
Q: Motivated by an account of a family dying when the seal on their refrigerator ruptured, this man and Leo Szilard patented a refrigerator that cooled using only heat as input. A model of the universe that is isotropic and homogeneous with zero curvature and zero cosmological constant is named for him and (*) de Sitter, while the rule that a repeated index in an expression is meant to be summed over every possible value of that index is known as his summation convention. Winning the 1921 Nobel Prize in Physics for his "discovery of the law of the photoelectric effect," for 10 points, name this physicist also known for his development of the theories of general and special relativity.
A:
Science