Part 2 of the TED Radio Hour episode Adaptation
About Daniel Kish's TED Talk
Daniel Kish has been blind since he was 13 months old, but has learned to "see" using a form of echolocation.
About Daniel Kish
When he was 13 months old, Daniel Kish lost both eyes to retinal cancer. He taught himself to navigate by clicking his tongue and listening for echoes — a method science calls echolocation, and that Kish calls flash sonar.