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This is CBS, I am the world.

I'm John Baths, for Hotel Mars, episode N, David Livingston, Dr. Space of the Space Show

is here with me as my co-pilot, and we're headed to other planets and eventually to other

planetary systems.

However, we need power to get there, and we all know about chemical rockets, Elon Musk

is the master of them.

He's building a ship that can take human beings to the moon and Mars and perhaps beyond.

But beyond that, what we need is a system that will take us for a long voyage efficiently.

And that describes fusion power.

I welcome Stephanie Thomas, the vice president of Princeton's satellite systems and the

new entry Princeton fusion.

However we're going to start with fusion energy to begin with for space travel.

Stephanie, a very good evening to you.

Thank you for this.

Fusion power is part of the nuclear energy mysteries to me.

But fusion propulsion is very focused, and I understand it's much more fuel efficient

...