This is CBS I on the world. I'm John Bachelor Hotel Mars. Episode N.

The David Livingston, Dr. Space himself of the space show my colleague and

co-pilot and we are thrilled to speak of the formation of the moon. Earth and the

moon, a new piece published at Nature magazine, the peer-reviewed

number one magazine in Europe for all science. The title, Moon Forming Impacter

as a source of Earth's basal mantle anomalies.

I have two men here to help me understand that extremely challenging title,

Chin-, of a graduate of PhD at Arizona State University, now a postdoc at Caltech,

and Edward Garnero, his co-author, he's at the School of Earth and Space Exploration Professor

at Arizona State University, which turns out to be the center of the universe if you're looking for origins of the moon.

Gentlemen, congratulations, this is thrilling.

My first question is to you, Ed, as the professor.

To help everybody understand what is the 21st century explanation for the

formation of our very large moon bigger than anything else I can remember in the

solar system.

Good evening to you, Anne.

Good evening.

Thanks, John, thanks David.

Thanks for having us.

We're super excited about this work that Chen led,

and I'm excited to be part of it.

So our current theory for the moon is that a early on in our solar system

...