X Stands for Unknown by Isaac Asimov

By Isaac Asimov

“If all questions have been spoke back, all riddles solved, each fold opened up, each wrinkle within the cloth of the Universe smoothed—the maximum and noblest video game within the Universe will be ended, and there will be not anything left for the brain to do yet console itself with minutiae. insufferable! might X continually BE WITH US TO manage to pay for US PLEASURE!”—Isaac Asimov

Asimov is once more at his top: exploring, inspiring, hypothesizing, and educating. no matter if he’s imagining a global during which silicon molucules may function the root for all times, speculating at the limits (in either instructions) of the electromagnetic spectrum, or just fiddling round with algebraic equations, Asimov provides his routinely superb essays on physics, chemistry, arithmetic, and astronomy with the wit and knowledge that experience made him the preferred author of technology today.

“ASIMOV PRACTICES WITH excessive stable HUMOR AND BRASH excitement THE function OF casual EXPLAINER-AT-LARGE TO THE UNIVERSE.”—The Wall highway magazine

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X Stands for Unknown

“If all questions have been responded, all riddles solved, each fold opened up, each wrinkle within the textile of the Universe smoothed—the maximum and noblest video game within the Universe will be ended, and there will be not anything left for the brain to do yet console itself with trivialities. insufferable! may possibly X consistently BE WITH US TO have enough money US excitement!

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Haired, blue-eyed daughter Other remarks are harder One to take. " "Certainly, dear," said I, all compliance. I gathered up the garbage container, opened the door, stepped out into the corridor; and there time, " FOUR HUNDRED OCTAVES 27 were Phyllis and Al coming toward me, big grins on outstretched in greeting. I I had to pass remind her And two that I there some off with it just said to Janet that to And was I, their faces, arms laden with garbage. off-the-cuff witticism, so you two were about to arrive I and said, that "Hi!

Nobody was looking for them, however. " These were a form of radiation that streamed across an evacuated cylinder from a negative electrode ("cathode") sealed inside, once an electric circuit The study reached its climax in was closed. " those particles were far less massive atoms. The mass of the cathode- least 837th that of a hydrogen atom, and He Thomson received the Nobel Prize for physics for this in 1906. The electron one of a was the subatomic particle discovered and first series of discoveries in the it was 1890s that totally revolutionized physics.

It show and a was well-attended, effi- bustling huckster room. Joe Haldeman was the guest of honor and gave an absolute whiz-bang of a talk that was greeted with great enthusiasm by the audience. This cast me down, I fear, for extend myself to the But what I I was scheduled I assure you. He him and I had to won designed an unbelievably clever "satyr" carried a pipes-of-Pan about his neck, blended perfectly with his looked to follow enjoyed the most was the costume show that was man who had by a young costume.

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