There's no doubt that in the last two to three decades, American democracy has been hacked. It was based on the regular harvesting of the wisdom of crowds, but now big sources of special interest money are able to prevent the passage of almost any meaningful reform that's aimed at the public interest.

When it comes to climate, we can all make a big difference. At the most basic level, don't let denial go unchallenged and win the conversation on climate.

The center of the earth is about a million degrees.

Remember America, I gave you the Internet and I can take it away.

I was recently on a tour of Latin America, and the only regret I have was that I didn't study Latin harder in school so I could converse with those people.

When we respond to threats immediately and take action right away, it's usually the threats that we're hard-wired to respond to, the kinds of things that our ancestors survived.

Third world nations are producing too many children too fast...it is time to ignore the controversy over family planning and cut out-of-control population growth.