Opportunities will be available to you that you cannot imagine.

Geologists have a saying - rocks remember.

I fully expected that, by the end of the century, we would have achieved substantially more than we actually did.

We have no proof, But if we extrapolate, based on the best information we have available to us, we have to come to the conclusion that ... other life probably exists out there and perhaps in many places.

People love conspiracy theories.

No matter when you had been to this spot before, a thousand years ago or a hundred thousand years ago, or if you came back to it a million years from now, you would see some different things each time, but the scene would be generally the same.

This blowing dust became increasingly thicker. It was very much like landing in a fast moving ground fog.