We know that he has stored secret supplies of biological and chemical weapons throughout his country.

There is an air of unreality in debating these arcane points when the world is changing in such dramatic ways right in front of our eyes because of global warming.

There are people who are genuinely upset in the Tea Party. I understand that. But that movement was funded with seed money from right-wing billionaires, the Koch brothers, and promoted on Fox News, and turned into a stocking horse for the right-wing agenda that a lot of people have been trying to push on the country for a long time.

Science has a culture that is inherently cautious and that is normally not a bad thing. You could even say conservative, because of the peer review process and because the scientific method prizes uncertainty and penalises anyone who goes out on any sort of a limb that is not held in place by abundant and well-documented evidence.

The will to act is a renewable resource.

As many of you know, I was very instrumental in the founding of the Internet

If the only tool we use to analyse what's valuable is a price tag, then those things that don't have price tags begin to look like they have no value.