This Wikipedia biography covers the life and legacy of Niels Bohr, a monumental figure in theoretical physics and a Nobel Prize winner. The text details his pioneering atomic model, which revolutionized our understanding of electron orbits, and his philosophical concept of complementarity. Beyond his scientific discoveries, the source outlines his leadership of the Niels Bohr Institute and his involvement in the Manhattan Project during World War II. It also describes his efforts to assist refugee scholars fleeing Nazism and his post-war advocacy for international nuclear cooperation. Finally, the article provides insights into his family history, his many prestigious awards, and his enduring impact on quantum mechanics.