Dr. David Eagleman

That's what the brain wants to do is get that stuff right.

As a result, if you suddenly ended up, you know, taking a trip to Mars and there's a whole very different society there that does businesses very differently, you would have to relearn stuff really quickly.

So here's the thing.

You went from having a brain that had high fluid intelligence to now having a brain that has high crystallized intelligence.

What that means is at the beginning, you can learn anything.

You could learn any language.

You could have dropped into any area.

You could have dropped into 13th century Japan.

When I was young.

When you were young, when you were a baby, if you had dropped out of the womb in, you know, 10th century Mongolia, you would have said like, okay, cool, learn the language.

You would be a 10th century Mongolian.

But as it happens, you dropped into this era, you know, a certain place and time and neighborhood and culture and family.

And so you learn that.

That's who you become is that person.

We often think that plasticity diminishes as you age, but it's not simply that it's diminishing.

It's that you are getting the right answers about how to operate in the world.

And so you don't have to change as much.

Your brain doesn't require as much change.

What if I want to change?

Yes.