Most of the intelligence out there must be artificial intelligence. We keep looking for critters like us living on a planet like ours, where in fact the majority of the intelligence out there is not biological. That would be my argument.

In archaeology, context is the basis of many discoveries that are imputed to the deliberate workings of intelligence. If I find a rock chipped in such a way as to give it a sharp edge, and the discovery is made in a cave, I am seduced into ascribing this to tool use by distant, fetid and furry ancestors.

Our brains are continuing to evolve, and perhaps a few tens of thousands of years from now, our descendants will walk around with five pound brains, allowing them insights that we can't imagine.

While it may be disappointing, I have to confess to people who ask for my insights on the meaning of it all that astronomy doesn't provide any clearly useful data on matters of sin and souls.

The next thing I am doing is moving back home to Minnesota and getting involved in politics. I'm looking at a run for Senate in 2008, but in the meantime I am focused on knitting together the progressive network in the upper Midwest.

It is our character that supports the promise of our future - far more than particular government programs or policies.

In a climate where much of foreign policy is a direct function of domestic politics, focusing on what one doesn't want is an easy way out of difficult conundrums for many world leaders. Expressing what one does want requires more courage.

What I hear every day on talk radio is America's lack of education - and I don't mean lack of college degrees. I mean lack of the basic art of democracy, the ability to seek the great truths that can come only by synthesizing the small truths possessed by each of us.