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...What the Fancy Machines Can - And Can't - Do New medical technology can probe, scan and make sophisticated diagnoses. But it's up to the body to cure
...What the Fancy Machines Can - And Can't - Do New medical technology can probe, scan and make sophisticated diagnoses. But it's up to the body to cure
...What the Fancy Machines Can - And Can't - Do New medical technology can probe, scan and make sophisticated diagnoses. But it's up to the body to cure
...Since 9/11, I've been forced to retire. Pretty much right away I had difficulty breathing because of all the dust and debris at the site. I went to our department doctor and as soon as they took a CAT scan they realized there was something wrong. I have serious lung problems. I retired in 2002, but then came back to the department as a consultant. On Sept. 11 we'd been unable to communicate with the radios we had in the Trade Center because of all the steel and concrete. I invented a radio, the Command Post Radio, that...
...this mystery as best they can with the tools they have. One important clue comes from the observation of the most distant quasars--objects believed to be giant black holes swallowing huge volumes of gas at the cores of young galaxies. The Sloan Digital Sky Survey, a comprehensive scan of the heavens, has turned up several of these from about a billion years after the Big Bang. By watching how the light of quasars is altered by surrounding gas, astronomers have concluded that there was still some atomic hydrogen around then, although not much...