"I want to know what good is a web search engine that returns 324,909,188 'matches' to my key word. That's like saying, "Good news, we've located the product you're looking for. It's on Earth."

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The production of motion in the steam engine always occurs in circumstances which it is necessary to recognize, namely when the equilibrium of caloric is restored, or (to express this differently) when caloric passes from the body at one temperature to another body at a lower temperature.

— Nicolas Leonard Sadi Carnot