Scientific truth is not what any one scientist puts forth. It can be that, but it is generally not. It is the sum of multiple studies that all lean in the same direction in their results conducted by different people at different times of different nationalities with different competitive urges who all end up getting the same result. Then you have an emerging scientific truth, and then you put that in the textbooks, and that will never be shown to be wrong later on.

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.

I wonder if, in fact, we have been observed by aliens and upon close examination of human conduct and human behavior they have concluded that there is no sign of intelligent life on Earth.

I remain unconvinced that anything other than rapid decomposition is the fate of my body and mind after death.

It's part of our pop culture to give animals human personalities and talents.

Civilization just takes it as a given that the whole world was flooding. Then science came and you had geology and modern astrophysics, and time became well understood going back billions of years. So enlightened religious people, as a necessity, had to shed the magical elements of the Bible. A little known fact is that Thomas Jefferson did just that. There's something called the Jefferson Bible. It's not widely publicized because it sort of conflicts with certain people's ideas of what the founding fathers were.

The number of people in the world engaged in this search for catastrophic impactors totals one or two dozen. How long into the future are you willing to protect Homo sapiens on Earth? Before you answer that question, take a detour to Arizona's Meteor Crater during your next vacation.