It is a tough choice between ending up in the cold or ending up in a fiery blast.

There are still so many questions to answer. When you look at any part of the universe, you have to feel humbled.

If you ask almost any of them, do you stand behind your theory, is this the answer, I think they would almost every one say that no, no, no, I'm just trying to expand the range of possibilities. We really don't know what is going on.

We have a remarkably complete picture in many ways - and it could be that we're not accounting for something that's almost three-quarters of the entire universe

So it's possible that someday, by understanding a little bit more about how the world works, it will come back to help us in some other way that will be surprising

Astronomers ought to be able to ask fundamental questions without accelerators

I will say that growing up as a kid in an urban environment and having lived in cities all my life, the one achievement that everyone can look forward to is getting the perfect parking spot