With dry wit and self-effacing good humor, Dr. Freeman Dyson explains that by heretical he means ideas that go against prevailing dogmas. In this lecture delivered in 2012, Dr. Dyson gives his findings on his study of climate science and biotechnological foods. The lecture is followed by a brief question and answer session. Dr. Dyson is a theoretical physicist and mathematician, known for his work in quantum electrodynamics, solid-state physics, astronomy and nuclear engineering. He is a member of the Board of Sponsors of the Bulletin of the Atomic Scientists.