Donald Hoffman explains the evolution of perceptions.
Donald Hoffman is a cognitive scientist and author of more than 90 scientific papers and three books, including Visual Intelligence: How We Create What We See (W.W. Norton, 2000). He received his BA from UCLA in Quantitative Psychology and his Ph.D. from MIT in Computational Psychology. He joined the faculty of UC Irvine in 1983, where he is now a full professor in the departments of cognitive science, computer science and philosophy. He received a Distinguished Scientific Award of the American Psychological Association for early career research into visual perception, and the Troland Research Award of the US National Academy of Sciences for his research on the relationship of consciousness and the physical world.
http://www.cogsci.uci.edu/~ddhoff/
This video is an excerpt from SAND Anthology Vol. 5