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...wrapped their uranium sample; the foil blocked the fission fragments that their instruments would otherwise have recorded. It was a blessing in disguise. If fission had come to light in the mid-1930s, while the democracies still slept, Nazi Germany would have won a long lead toward building an atom bomb. In compensation, Fermi made the most important discovery of his life, that slowing neutrons by passing them through a light-element "moderator" such as paraffin increased their effectiveness, a finding that would allow releasing nuclear energy in a reactor...

Author: /time Magazine | Title: Atomic Physicist: ENRICO FERMI | 3/29/1999 | See Source »

...Hitler had not hounded Jewish scientists out of Europe, the Anglo-American atom bomb program sparked by the discovery of fission late in 1938 would have found itself shorthanded. Most Allied physicists had already been put to work developing radar and the proximity fuse, inventions of more immediate value. Fermi and his fellow emigres--Hungarians Leo Szilard, Eugene Wigner, John von Neumann and Edward Teller, German Hans Bethe--formed the heart of the bomb squad. In 1939, still officially enemy aliens, Fermi and Szilard co-invented the nuclear reactor at Columbia University, sketching out a three-dimensional lattice of uranium...

Author: /time Magazine | Title: Atomic Physicist: ENRICO FERMI | 3/29/1999 | See Source »

From that first small pile grew production reactors that bred plutonium for the first atom bombs. Moving to Los Alamos in 1944, Fermi was on hand in the New Mexican desert for the first test of the brutal new weapon in July 1945. He estimated its explosive yield with a characteristically simple experiment, dropping scraps of paper in the predawn stillness and again when the blast wind arrived and comparing their displacement...

Author: /time Magazine | Title: Atomic Physicist: ENRICO FERMI | 3/29/1999 | See Source »

...Telephone Laboratories in Murray Hill, N.J., observed that when electrical signals were applied to contacts on a crystal of germanium, the output power was larger than the input. Shockley was not present at that first observation. And though he fathered the discovery in the same way Einstein fathered the atom bomb, by advancing the idea and pointing the way, he felt left out of the momentous occasion...

Author: /time Magazine | Title: Solid-State Physicist WILLIAM SHOCKLEY | 3/29/1999 | See Source »

Science fiction boasts an impressive predictive track record--if you squint hard and ignore most of the evidence. Atom bombs, spacecraft, comsats, credit cards, jukeboxes, waterbeds, gene splicing--they all appeared in science fiction first, well before showing up at the mall or on the military base. But science fiction is visionary by design and prophetic only by accident. You'll have a hard time finding androids, aliens, time travelers or psychic powers at the K-mart, even though science-fiction writers have obsessed about them for 70 years...

Author: /time Magazine | Title: A Century Of Science Fiction | 3/29/1999 | See Source »

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