For me, the most fascinating interface is Twitter. I have odd cosmic thoughts every day and I realized I could hold them to myself or share them with people who might be interested.

The theory of evolution, like the theory of gravity, is a scientific fact.

If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of solar energy, the air temperature would rise, and the oceans would swiftly evaporate into the atmosphere as they sustained a rolling boil. This would be bad.

The trend lines in research and innovation look good for places such as India and China and less good for America as we go forward. So even if you're not enchanted by the prospect of cosmic discovery, the prospect of dying poor may be what it takes to understand the role of this adventure in the future of the natural world in which we live.

I love the future we might invent for ourselves that I have not yet dreamt of.

There's nothing a teacher likes better than ten minute videos. It's not the whole class, but it's not too short, it's enough to wrap a lesson plan around.

There's a saying in the scientific community, that every great truth goes through three phases. First, people deny it. Second, they say that it conflicts with the Bible. Third, they say that they've known it all along.