Time travel, by its very nature, was invented in all periods of history simultaneously.

Words used carelessly, as if they did not matter in any serious way, often allowed otherwise well-guarded truths to seep through.

Joo Janta 200 Super-Chromatic Peril Sensitive Sunglasses have been specially designed to help people develop a relaxed attitude to danger. At the first hint of trouble, they turn totally black and thus prevent you from seeing anything that might alarm you.

I don't really have any advice, other than to say it's the most appallingly difficult thing I've ever tried to do and I wish I had a better idea of how to do it. In my experience what you end up with is the by-product of your failure to achieve what you set out to do. It may turn out OK, but it wasn't what you meant and you've no idea how you got there.

Ghastly," continued Marvin, "it all is. Absolutely ghastly. Just don't even talk about it. Look at this door," he said, stepping through it. The irony circuits cut in to his voice modulator as he mimicked the style of the sales brochure. " 'All the doors in his spaceship have a cheerful and sunny disposition. It is their pleasure to open for you, and their satisfaction to close again with the knowledge of a job well done.' " As the door closed behind them it became apparent that it did indeed have a satisfied sighlike quality to it. "Hummmmmmmyummmmmmmah!" it said.

So what do we do if we get bitten by something deadly?' I asked. He looked at me as if I were stupid. 'You die, of course. That's what deadly means.

It startled him even more when just after he was awarded the Galactic Institute's Prize for Extreme Cleverness he got lynched by a rampaging mob of respectable physicists who had finally realized that the one thing they really couldn't stand was a smart-ass.