David Eagleman

This is all theoretical right now, but I don't think this is more than 20, 30 years off, where you do three-dimensional printing, atomically precise, you make molecular robots, Hundreds of millions of these. And then you put them in a capsule and you swallow the capsule. And these little robots swim around and they go into your neurons, these cells in your brain.

This is all theoretical right now, but I don't think this is more than 20, 30 years off, where you do three-dimensional printing, atomically precise, you make molecular robots, Hundreds of millions of these. And then you put them in a capsule and you swallow the capsule. And these little robots swim around and they go into your neurons, these cells in your brain.

This is all theoretical right now, but I don't think this is more than 20, 30 years off, where you do three-dimensional printing, atomically precise, you make molecular robots, Hundreds of millions of these. And then you put them in a capsule and you swallow the capsule. And these little robots swim around and they go into your neurons, these cells in your brain.

And from there, they can send out little signals saying, hey, this neuron just fired. And once we have that sort of thing, then we can say non-invasively, here's what all these neurons are doing at the same time. And then we'll really understand the brain.

And from there, they can send out little signals saying, hey, this neuron just fired. And once we have that sort of thing, then we can say non-invasively, here's what all these neurons are doing at the same time. And then we'll really understand the brain.

And from there, they can send out little signals saying, hey, this neuron just fired. And once we have that sort of thing, then we can say non-invasively, here's what all these neurons are doing at the same time. And then we'll really understand the brain.

What we have now is EEG, electroencephalography. And there are several really good companies like Muse and Emotive that have come out with at-home methods. You just strap this thing on your head and you can measure what's going on with your brainwaves. The problem is that brainwaves are still pretty distant from the activity of 86 billion chattering neurons.

What we have now is EEG, electroencephalography. And there are several really good companies like Muse and Emotive that have come out with at-home methods. You just strap this thing on your head and you can measure what's going on with your brainwaves. The problem is that brainwaves are still pretty distant from the activity of 86 billion chattering neurons.

What we have now is EEG, electroencephalography. And there are several really good companies like Muse and Emotive that have come out with at-home methods. You just strap this thing on your head and you can measure what's going on with your brainwaves. The problem is that brainwaves are still pretty distant from the activity of 86 billion chattering neurons.

An analogy would be if you went to your favorite baseball stadium and you attached... a few microphones to the outside of the stadium and you listened to a baseball game, but all you could hear with these microphones is occasionally the crack of the bat and the roar of the crowd. And then your job is to reconstruct what baseball is just from these few little signals you're getting.

An analogy would be if you went to your favorite baseball stadium and you attached... a few microphones to the outside of the stadium and you listened to a baseball game, but all you could hear with these microphones is occasionally the crack of the bat and the roar of the crowd. And then your job is to reconstruct what baseball is just from these few little signals you're getting.

An analogy would be if you went to your favorite baseball stadium and you attached... a few microphones to the outside of the stadium and you listened to a baseball game, but all you could hear with these microphones is occasionally the crack of the bat and the roar of the crowd. And then your job is to reconstruct what baseball is just from these few little signals you're getting.

So I'm afraid it's still a pretty crude technology.

So I'm afraid it's still a pretty crude technology.

So I'm afraid it's still a pretty crude technology.

The fact is, if you felt good at some moment in your life and you sat around and tried to reproduce that, I think you'd do just as well thinking about that moment and trying to put yourself in that state rather than trying to match a squiggly line.

The fact is, if you felt good at some moment in your life and you sat around and tried to reproduce that, I think you'd do just as well thinking about that moment and trying to put yourself in that state rather than trying to match a squiggly line.

The fact is, if you felt good at some moment in your life and you sat around and tried to reproduce that, I think you'd do just as well thinking about that moment and trying to put yourself in that state rather than trying to match a squiggly line.

I think that's right. I mean, there's also this very deep question about what kind of feedback is useful for you. Most of the action in your brain is happening unconsciously. It's happening well below the surface of your awareness or your ability to access it. And the fact is that your brain works much better that way. Do you play tennis, for example? Not well. Or golf? Golf I play. Okay, good.

I think that's right. I mean, there's also this very deep question about what kind of feedback is useful for you. Most of the action in your brain is happening unconsciously. It's happening well below the surface of your awareness or your ability to access it. And the fact is that your brain works much better that way. Do you play tennis, for example? Not well. Or golf? Golf I play. Okay, good.