I thought jet planes were just trucks with more wings and less wheels.

The sign, which says: "Do not, under any circumstances, open this door!" - Of course, I've read it. Why do you think I want it opened?.. To see why they wanted it shut, of course. This exchange contains almost all you need to know about human civilization. At least, those bits of it that are now under the sea, fenced off or still smoking.

It's tough at the top. It's tough at the bottom. But in between you could use them for horse-shoes.

I'd like to walk on the moon (and return).

Rings try to find their way back to their owner. Someone ought to write a book about it.

It cannot be said often enough that science fiction as a genre is incredibly educational - and I'm speaking the written science fiction, not 'Star Trek.' Science fiction writers tend to fill their books if they're clever with little bits of interesting stuff and real stuff.

Probably the last man who knew how it worked had been tortured to death years before. Or as soon as it was installed. Killing the creator was a traditional method of patent-protection.