David Chalmers is an Australian philosopher and cognitive scientist known for his work in the philosophy of mind and consciousness. He gained prominence for articulating the "hard problem of consciousness," which addresses why and how subjective experiences arise from physical processes in the brain. Chalmers has also contributed to discussions on artificial intelligence and virtual reality. Chalmers is a professor at New York University and co-director of the Center for Mind, Brain, and Consciousness. He has authored several influential books, including "The Conscious Mind" and "Constructing the World," which explore the nature of consciousness and reality.