Steve Levitt

So I first came to your work because I was so blown away by the idea of human echolocation. Yeah. only to discover that echolocation is only the tip of the iceberg. But could you talk just a bit about echolocation, how quickly, with training, it can start to substitute for sight?

So I first came to your work because I was so blown away by the idea of human echolocation. Yeah. only to discover that echolocation is only the tip of the iceberg. But could you talk just a bit about echolocation, how quickly, with training, it can start to substitute for sight?

So I first came to your work because I was so blown away by the idea of human echolocation. Yeah. only to discover that echolocation is only the tip of the iceberg. But could you talk just a bit about echolocation, how quickly, with training, it can start to substitute for sight?

And then in these studies, you put a blindfold on a person for two or three days and you try to teach them echolocation. If I understand correctly, even over that timescale, the echolocation starts taking over the visual part of the brain. Is that a fair assessment?

And then in these studies, you put a blindfold on a person for two or three days and you try to teach them echolocation. If I understand correctly, even over that timescale, the echolocation starts taking over the visual part of the brain. Is that a fair assessment?

And then in these studies, you put a blindfold on a person for two or three days and you try to teach them echolocation. If I understand correctly, even over that timescale, the echolocation starts taking over the visual part of the brain. Is that a fair assessment?

So in your book, you talk about REM sleep. And honestly, if I had sat down and tried to come up with an explanation of REM sleep, I could have listed a thousand ideas. Your pet theory would not be one of them. So explain what REM sleep is and then tell me why you think we do it.

So in your book, you talk about REM sleep. And honestly, if I had sat down and tried to come up with an explanation of REM sleep, I could have listed a thousand ideas. Your pet theory would not be one of them. So explain what REM sleep is and then tell me why you think we do it.

So in your book, you talk about REM sleep. And honestly, if I had sat down and tried to come up with an explanation of REM sleep, I could have listed a thousand ideas. Your pet theory would not be one of them. So explain what REM sleep is and then tell me why you think we do it.

Have you convinced the sleep scientists this is true? Or is this just you believing it right now?

Have you convinced the sleep scientists this is true? Or is this just you believing it right now?

Have you convinced the sleep scientists this is true? Or is this just you believing it right now?

So we talked about echolocation, which uses sound to accomplish tasks that are usually done by vision. And you've started a company called Neosensory, which uses touch to accomplish tasks that are usually done with hearing. Can you explain the science behind that?

So we talked about echolocation, which uses sound to accomplish tasks that are usually done by vision. And you've started a company called Neosensory, which uses touch to accomplish tasks that are usually done with hearing. Can you explain the science behind that?

So we talked about echolocation, which uses sound to accomplish tasks that are usually done by vision. And you've started a company called Neosensory, which uses touch to accomplish tasks that are usually done with hearing. Can you explain the science behind that?

Just make sure I understand it. Sounds happen, and this wristband... hears the sounds and then shoots electrical impulses into your wrist that correspond to the high and low frequency?

Just make sure I understand it. Sounds happen, and this wristband... hears the sounds and then shoots electrical impulses into your wrist that correspond to the high and low frequency?

Just make sure I understand it. Sounds happen, and this wristband... hears the sounds and then shoots electrical impulses into your wrist that correspond to the high and low frequency?

Do people train? You give them very direct feedback? Or is it more organic?

Do people train? You give them very direct feedback? Or is it more organic?