Gregory and James Benford on the Starship Century this week on planetary Radio. Radio. Welcome to the Travel Show that takes you to the Final Frontier.

I'm Matt Kaplan of the Planetary Society.

We continue our coverage of Humanities. I'm Matt Kaplan of the Planetary Society.

We continue our coverage of humanity's

interstellar future with the brilliant twin brothers who have just

edited a book about that dream, Starship Century

toward the grandest Horizon.

Bill Nye takes a break from Dancing with the Stars to talk with us about the latest dance

between a commercial space capsule and the International Space Station.

And it's all about shrouds and clouds of planets

when Bruce Betts drops by for What's Up.

We begin with Emily Lockawala.

Emily, I was all set to talk about your blog entry from the 26th of September and the first thing you told me is that you have part two of this up now and it's all about trying to date things that is things, especially on the moon.

That's right. I had started doing a research for an article on clay minerals on Mars,

and I just kept on digging back and back and back into paper after reference paper.

And finally I found myself writing a blog entry about the Moon's large impact basins and

how we use them to set up geologic time scales across the solar system. How did they actually create this time scale?

How did they actually create this time scale?

Because out of this one article is a list of all of these huge basins in the

what we think may be the approximate order they were created?

That's right, so we use the same general kinds of principles on the moon as we do on Earth.

There's two main things you do.

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