Anyone who's not interested in model airplanes must have a screw loose somewhere.

Suddenly, we humans - a recently arrived species, no longer subject to the checks and balances inherent in nature - have grown in population, technology and intelligence to a position of terrible power.

The surviving intelligent life form on Earth is not going to be carbon-based; it's going to be silicon-based.

Anyone who's not interested in model airplanes must have a screw loose somewhere.

We're short on wisdom; we're high on technology. Where's it going to lead?

Your grandchildren will likely find it incredible - or even sinful - that you burned up a gallon of gasoline to fetch a pack of cigarettes!

I'm more interested in a world that works than what sells.