Scientists scanned the brains of taxi drivers and compared them with the brains of ordinary people.
Are London cab driver's brains bigger ?
Yes, Sum. They are. You're a smart boy.
If you mind, would you explain it in more detail ?
Sure. They was a difference in size between the hippocampus of a cab driver and the hippocampus of an ordinary person.
What you mean is when your brain uses navigation skills more, the hippocampus becomes bigger, right ?
That's right.
Wow !