文章列表

• 1.万物简史 第223期:把铅撵出去(12)
• As always, however, nothing was quite as straightforward as such a breezy description makes it sound. Meteorites are not abundant and meteoritic sampl...
• 2.万物简史 第222期:把铅撵出去(11)
• For seven years, first at the University of Chicago and then at the California Institute of Technology (where he moved in 1952), he worked in a steril...
• 3.万物简史 第221期:把铅撵出去(10)
• But there were many technical difficulties to overcome. Holmes also neededor at least would very much have appreciatedsophisticated gadgetry of a sort...
• 4.万物简史 第220期:把铅撵出去(9)
• Holmes was heroic as much for the obstacles he overcame as for the results he achieved. By the 1920s, when Holmes was in the prime of his career, geol...
• 5.万物简史 第219期:把铅撵出去(8)
• Finally, and perhaps a little unexpectedly, readings can be thrown out by seemingly unrelated external factorssuch as the diets of those whose bones a...
• 6.万物简史 第218期:把铅撵出去(7)
• Rather than restate every one, scientists decided to keep the inaccurate constant. Thus, Tim Flannery notes, every raw radiocarbon date you read today...
• 7.万物简史 第217期:把铅撵出去(6)
• Up to this time, the oldest reliable dates went back no further than the First Dynasty in Egypt from about 3000B.C. No one could confidently say, for ...
• 8.万物简史 第216期:把铅撵出去(5)
• Chlorofluorocarbons are also not very abundantthey constitute only about one part per billion of the atmosphere as a wholebut they are extravagantly d...
• 9.万物简史 第215期:把铅撵出去(4)
• Buoyed by the success of leaded gasoline, Midgley now turned to another technological problem of the age. Refrigerators in the 1920s were often appall...
• 10.万物简史 第214期:把铅撵出去(3)
• As Sharon Bertsch McGrayne notes in her absorbing history of industrial chemistry, Prometheans in the Lab, when employees at one plant developed irrev...