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Dinosaurs are extinct today because they lacked opposable thumbs and the brainpower to build a space program.

You know, being a test pilot isn’t always the healthiest business in the world.

Science has not yet mastered prophecy. We predict too much for the next year and yet far too little for the next 10.

Astronomy compels the soul to look upward, and leads us from this world to another.

Science cuts two ways, of course; its products can be used for both good and evil. But there’s no turning back from science. The early warnings about technological dangers also come from science.