Why do we see illusions? Learn more on EarthSky. | Human World

In this video, neuroscientist Mark Changizi explains why illusions occur, and why the brain can’t properly render simple optical stimuli. Mark Changizi gave this presentation at the TedYouth 2012 conference, and it was recently uploaded at TedEd, which also has a bunch of other cool videos.

For more with Mark Changizi, check out these interviews:

Mark Changizi on how language and music got into our brains

Mark Changizi: Why human eyes see in color

Mike Brennan

Michael Brennan interviews scientists, serves as a host for both the EarthSky 90-second podcasts and EarthSky 22, and oversees the EarthSky Studio. He uses his recording expertise to help create EarthSky audio and video science interviews in both English and Spanish, making sure that our audio’s technical quality exceeds everyone’s expectations. He is a member of the EarthSky Management Team.