TED Talk: Daniel Kish on Learning to "See" Using Echolocation

When you hear the word “echolocation” you probably think of bats. After all, we use the phrase “blind as a bat” and we know that bats use echolocation–bouncing sounds off of hard surfaces–to navigate their space effectively, despite poor eyesight. But did you know that humans are capable of this too? Daniel Kish, who became…