Click and Collect is now available at Selected London Primark stores for kids, baby and nursery products.

Shop exclusive ranges online and head to our designated Click and Collect collection points when your order is ready.

Go to Primark.com and shop Primark Click and Collect today. Little prices, big smiles.

This is CBS Eye in the World, I'm John Bachelor.

I'm spending time with Daniel Claude, Professor Daniel Claude, whose new book is Koala.

A natural history in an uncertain future. Daniel's written several books, one of which is the tragic figure in Bambi, Fire.

And we're going to mention that because that's part of the challenge that Koala must now deal with.

Having survived 24 million years in a continent that was once part of Gondwala, South America and Antarctica, Australia.

It is now on its own in different parts of Australia, depending upon where the people are.

We're going to talk about what they must have, which is eucalyptus trees.

Daniel tells me there are eight to 900 species of eucalyptus utilists. Did I write that down correctly, Daniel?

Yes, that's one of those species. But yeah, eucalyptus is a very big group.

So it's the dominant form of a lot of Australian forests. The most widespread forest we have is eucalyptus.

But we tend to think of them all as one thing, just eucalyptus.

But in actual fact, they comprise eight to 900 different species and subspecies.

Koala's challenge is to eat eucalyptus leaves every day and make them nutritious. How do they do it?

In fact, it's so magical. I was writing down my notes here. They have parts of their internal system that we don't have.

We have an appendix. They have something called a CCM. How do you say that word?

Yeah, yes, CCM or CCM. Yep, that's great.

But it's really interesting that the issue with eucalyptus is that they're very fibrous.

They're very hard. The leaves are quite, they're not soft. They're quite hard and woody.

And so they're hard to digest. They're hard for them to break down.

...