This is a download from BBC Learning English.
To find out more, visit our website.
Hello, this is Six Minute English, I'm Rob.
And I'm Neil.
Do you ever experience anxiety, Neil?
Anxiety?
Yes, you know, a feeling of being really worried or nervous without any real reason.
Well, not really, but I know for some people it can be quite a serious problem.
Well, anxiety may be a result of natural selection.
Natural selection, you mean the principle behind evolution?
Yes, the idea that life on this planet has developed as a result of random changes in biology over many, many years.
So why have anxiety?
That seems like a negative rather than a positive thing to develop.
Well, we'll find out more in this programme.
But before we do, a quiz.
Charles Darwin is famous for describing evolution by natural selection.
What was the name of the ship he travelled on when he made his discoveries?
Was it A, HMS Beagle B, HMS Badger, or C, HMS Bear?
What do you think, Neil?
Well, I'm pretty sure I know this one, so I'm not going to give away the answer just yet.