When U.S. rocket engineers talk about the bright possibilities of solid-fuel rockets, they always have to pause over one big requirement: how to control the fuel’s burning rate. A current system is to ...

“Can’t we just invent a new fish?” the kid asked. I was teaching my Astro104 class –- “The Planets” -- and I always spend some time looking at the evolution of life on Earth. I have come to see the ...

It is in science that the characteristically modern man puts his trust for the future of society. He may, if he is religiously-minded, choose to regard the exercise of his natural powers as being in ...

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