There are no articles any more that dream about the cities of tomorrow.

Intelligent design is a philosophy of ignorance.

Dark matter and dark energy are two things we measure in the universe that are making things happen, and we have no idea what the cause is.

I try to keep this in mind when tied in to a rope 75 feet up in a tree... The history of ideas about our place in the universe has been a long series of let-downs for those who like to believe we are special.

Today secular philosophers call that kind of divine invocation God of the gaps-which comes in handy, because there has never been a shortage of gaps in people's knowledge.

Where there's water on Earth, you find life as we know it. So if you find water somewhere else, it becomes a remarkable draw to look closer to see if life of any kind is there, even if it's bacterial, which would be extraordinary for the field of biology.

Nothing is a thing: it's nothing. So I can imagine a place where there's not even nothing.