Rusty Schweickart

We are going to learn how to relate to the Earth and our own natural environment here by looking seriously at space colony ecologies.

We're not passengers on Spaceship Earth. We're the crew.

When you have an asteroid threatening Earth, it's uncertain where it's going to hit until the last minute; the decision to take action has to be coordinated by the international community.

I'm a big action junkie. I grew up on the '80s action movies - the bad ones and the good ones.

A 'live' show is either alive or not. Free speech is free or it is not. Viewers are free to use their remote or TiVo. Parents are responsible or they are not.

The Gulf of Mexico, they believe, is a huge asteroid. That was an impact zone, you know that? Yeah, for that big a thing to actually hit our globe, it would have had to adjusted the spin, the axis.