Dr. Naomi Oreskes, Harvard University Professor of the History of Science and Co-Author of "Merchants of Doubt" speaks on "Why We Should Trust Science (Most of the Time): Perspectives from the History and Philosophy of Science." Oresekes raises the concern that many people are confused about the safety of vaccines, the reality of climate change, and other matters. Doctors tell us that vaccines are safe, and climate change is real, but how do they know that? And how are we to make sense of competing claims? In this lecture, Professor Naomi Oreskes argues that we should trust science, and she explains why.