Subhash Kak (born 26 March 1947, Srinagar) is an Indian-American computer scientist and a Hindutva-based historical revisionist. He is the Regents Professor of Computer Science Department at Oklahoma State University–Stillwater, an honorary visiting professor of engineering at Jawaharlal Nehru University, and a member of the Indian Prime Minister’s Science, Technology and Innovation Advisory Council (PM-STIAC). Kak has published on the history of science, the philosophy of science, ancient astronomy, and the history of mathematics. Kak has also published on archaeoastronomy, and advocated the idea of Indigenous Aryans. Scholars have rejected his theories on these topics in entirety, and his writings have been heavily criticized. In 2019, the Government of India awarded him with Padma Shri, the fourth highest civilian award in India.