Helen Caldicott, MD, will speak on “Lessons from Fukushima: What role should nuclear energy and natural gas extraction play in our energy future?” at 7 p.m. Monday, Oct. 10, in the UU-Mandela Room. Co-founder of Physicians for Social Responsibility, an organization of 23,000 doctors committed to educating their colleagues about the dangers of nuclear power, nuclear weapons and nuclear war, Caldicott was named by The Smithsonian as one of the most influential women of the 20th century. She has has authored seven books, including “Nuclear Power is Not the Answer” (2006) and “A Desperate Passion: An Autobiography” (1996). Her most recent book is the newly revised and updated “If You Love This Planet: A Plan to Heal the Earth” (2009). Sponsored by the Student Environmental Action Coalition and the Environmental Studies Program, Broome County Peace Action and the Sierra Club, Susquehanna Group. Free and open to the public. The talk will be preceded at 6:30 p.m. by a free concert by folk musician Janet Burgan. A book signing will follow.