Unfortunately, pioneers will always pave the way with sacrifices.

We'll get to the details of what's around here, but it looks like a collection of just about every variety of shape - angularity, granularity, about every variety of rock.... The colors - well.... There doesn't appear to be too much of a general color at all; however, it looks as though some of the rocks and boulders are going to have some interesting colors to them. Over.

To appropriately respond to an emergency requires a very clear mind, to cooly analyze what the observations are and how to fix it.

Trips to Mars, the Moon, even orbit, will require that we provide astrotourists with as many comforts from home as possible, including paying each other.

I don't believe any pair of people had been more removed physically from the rest of the world than we were.

Like actors and writers who are on and off again in terms of employment, I had a very unstructured life.

Climate has been changing for billions of years.