Word: detective
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Dates: during 1980-1989
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...motion inside. Just as a train whistle is higher in pitch as it approaches than when it recedes, radio waves also vary in frequency according to direction of motion. Using the radio telescope like a police-radar detector, the astronomers measured the movement within the cloud. "We didn't detect any motion in the outer, cooler regions," reports Wilking. "It was as we probed deeper and deeper that we began to see evidence of gas falling inward...
...team painstakingly swept 120,000 linear miles of ocean with magnetometers, devices that detect irregularities in the earth's magnetic field--anomalies caused by, among other things, iron cannons, armor or anchors. They used side-scan and sub-bottom sonar and even commissioned an aerial survey, but the search did not yield a verifiable Atocha remnant. Says Fay Feild, an engineer and consultant to Treasure Salvors, who designed a special magnetometer for Fisher: "With a magnetometer, even in a limited area, only one in 100 'hits' has anything to do with a wreck. With a side- scanner...
Since that loss, each time I take my daily stroll through the Boston streets, I can detect Celtic grins all around...
...donated. Since each pint donated can be split among two or three recipients, as many as 360 people could receive AIDS-infected blood each year, though how many will develop the disease is unknown. The main reason for the slipups, explains Chalmers, is that the existing blood- screening test detects antibodies to the AIDS virus rather than the virus itself. Since someone infected with the AIDS virus may take several weeks to develop antibodies, he says, "there is a dangerous window of time" when the test will fail to detect infection...
...donor blood in the U.S. is screened for AIDS contamination, one undisputed case of transfusion-borne infection was reported two weeks ago. A donor gave blood so soon after the homosexual encounter that infected him that his body had not yet produced the antibodies the test is designed to detect...