I have worked for YouTube like texting and driving because I was curious to test what's out there and how does it function, can I release something like about texting and driving to very young audiences, at the age where they do their drivers test? And the response was phenomenal, millions of people saw it.

The elections have a different platform, the town hall is the platform for it. But the other question behind all this is should I run for president?

Some of the most important caves, like Lascaux in the Dordogne region in France, have had to be closed down. There had been too many people allowed in, and they left a mold on the walls that is spreading and which can't really be stopped.

At the end [when I speak about] magma under us everywhere, how it's monumentally indifferent to scurrying roaches, recoiled reptiles, and vapid humans alike. You see, you would never hear anything like that in a National Geographic or a PBS movie. This is clearly a transgression when it comes to being politically correct with your commentary.

"Jack Reacher" was easy because the function of the villain was just to spread fear and horror.

We were very, very lucky [with Tim White filmed making historic discoveries in the East African Rift ] . In 100 years, only three skeletal remains [of early man] were ever found at this site. This was the third one, and we were right there when it happened. In fact, when I first heard they had found something, I said, "Please stop it! Don't do anything right now. Let's do it tomorrow until we have unpacked our cameras and assembled our stuff.

I wouldn't make a connection between the daily news and volcanoes.