Max Tegmark is a Swedish-American cosmologist and professor at the Massachusetts Institute of Technology. He is best known for his work on the foundations of physics, cosmology, and artificial intelligence. Tegmark has made significant contributions to the fields of cosmology and physics, including the development of the mathematical universe hypothesis, which suggests that the physical universe is a mathematical structure. He has also proposed the use of machine learning to study the universe, and has written extensively on the implications of artificial intelligence. Tegmark is a member of the National Academy of Sciences and the American Academy of Arts and Sciences, and has received numerous awards for his work.