Max Tegmark writes popular science about cosmology, artificial intelligence and the mathematical structure of reality. Our Mathematical Universe argues that physical reality may itself be a mathematical structure, using modern cosmology and multiverse ideas to build the case. Life 3.0 turns to artificial intelligence, asking how increasingly capable systems could affect work, warfare, governance and long-term human goals. Tegmark's writing is speculative but grounded in contemporary physics and AI debates, with thought experiments used heavily. The strongest audience overlap is with readers of cosmology, AI futures, big-picture science and philosophy of physics. Read more Less