This is CBS I on the World. Here's John Bachelor.

Hotel Mars episode and David Livingston, Dr. Space, my colleague and co-host, and co-pilot.

And again, we're going back in our time machine to the period that is associated with the ending of

dinosaurs, that asteroid that struck somewhere near the Yokatan Peninsula that

changed the direction of planet Earth towards mammals and other creatures.

We welcome Professor Ted Schultz, research enemologist, Department of Enemology, National

Museum of Natural History, Smithsonian

Institution publishing recently at Science magazine about other creatures

on Earth and some of those creatures are fungi that blossomed after the death

of the dinosaurs. Ted a very good evening to you thank you very. Ant farmers.

This is a wonderful concept.

You propose in your science piece that

ant farming existed before the dinosaur's death, but that it blossomed afterwards.

What is ant farming, Ted?

Good evening to you.

And good evening to you and thank you for inviting me.

Uh, ant farming is actually what you might expect.

It's, there's a sub, there are many species of ants,

over 14,000 species of ant.

A very small number, all descended from a common farming ancestor,

a slightly less than 250 species, practice true agriculture.

They grow fungi for food.

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