Word: hydrogens
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...Bulletin's doomsday clock was first set at seven minutes before midnight in 1947. The clock has moved as close as two minutes before midnight (in 1953, when the Soviets detonated their first hydrogen bomb) and as far away as twelve minutes (most recently in 1972, when the U.S. and U.S.S.R. signed SALT I, the arms-limitation agreement...
...those guys, the mission would have been a failure on the first day." The astronauts also found time to clown for the TV cameras and take telephone calls from President Reagan and West German Chancellor Helmut Kohl. But some problems simply had to be endured, like the accumulation of hydrogen gas in their water supply, which caused annoying flatulence. Joked Young: "As long as nobody lights any cigarettes, we're all right...
...gleaming celestial laboratory. Said Lichtenberg, a biomedical engineer from M.I.T.: "It's just an amazing vehicle. Spacelab lives up to all its expectations." In one experiment involving a pallet instrument called a spectrophotometer, the scientists succeeded in making the first measurements of deuterium, a heavy form of hydrogen, in the upper atmosphere. By such observations, scientists can study weather patterns on earth. They can also explore the history of distant worlds, since the presence of large quantities of deuterium is a sign that a planet may once have held water, which is essential for life. Scanning the skies, Spacelab...
...test flight, Spacelab will contain some 70 experiments designed by scientists from the U.S., Western Europe, Canada and Japan. Among them: a French experiment that will measure the radiation produced by sunlight's action on hydrogen; a West German high-resolution camera that will map the earth's surface; a U.S. study that may help explain the life cycle of stars and galaxies. Other tests will determine the advantages of fabricating specialized terrestrial materials (crystals, alloys, ceramics) in conditions of weightlessness rather than on earth. There are also studies to see how humble forms of life adapt...
...other hand, Teller, who is considered the father of the hydrogen bomb, acknowledged that while the development of such weapons will prove scientifically difficult, it is necessary to curb a growing Soviet military threat...