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This is John Batchel. A wonderful conversation with Daniel Clode. It's koala time of year

down under. It is summertime and the koalas are playful. The little joys have been born.

The moms carry joys around for years. The koalas live in eucalyptus trees.

They eat eucalyptus leaves, which are really tough, filled with resin. And here, Danielle

Claude introduces us to the evolution of koala teeth. She describes pinking shears.

That's how sharp they are to deal with the eucalyptus leaves.

The eucalyptus trees are also in danger to koalas.

Every time I see bushfires now, I worry about the koalas who live in those bush trees,

in those eucalyptus trees, and the bushfires sweep over them,

and they don't protect themselves.

They stay with the tree.

Very sad business.

In any event, koalas, not bears, they're marsupials,

and the joys are very cute.

Koala teeth.

What does it tell us about eucalyptus trees and koalas?

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