In this thought-provoking episode some very tricky optical illusions show that the brain doesn't always correctly interpret what it sees. Check out Bill Nye from a whole new angle when he gets an M. R. I. of his brain.

Teacher's guide also available under Additional info tag. Originally broadcast on the television program: Bill Nye, the science guy ; In English or Spanish language ; Grade 4 and up ; "Disney presents."

Special features: Fully indexed "chapters" correlated to National Science Standards; interactive glossaries and quizzes; bonus footage of never-before-seen segments, interviews, and demos; on-disk implementation guide.