Helen Caldicott, Nobel Peace Prize nominee
Patricia Churchland, Neuroscientist and philosopher, UC San Diego
Ursula Goodenough, President,  Institute on Religion in an Age of Science (1992-96)
James Lovelock, Creator of the Gaia Theory
Irene Pepperberg, author of the Alex (parrot) studies
Michael Shermer, Founder of the Skeptics Society
Jeremy Stone, President, Federation of American Scientists (1970-2000)
David Suzuki, Canada’s top science & nature broadcaster