UColleen Josephson, uprofesa oncedisayo wobunjineli bombane kunye neekhompyutha kwiYunivesithi yaseCalifornia, eSanta Cruz, wakhe umzekelo wethegi yerediyo-frequency engasebenziyo enokungcwatywa phantsi komhlaba kwaye ibonise amaza erediyo avela kumfundi ongaphezulu komhlaba, nokuba ubanjwe ngumntu, ethwalwe ngu ...
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