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Researchers Clear 'Patient Zero' From AIDS Origin Story It's one of the biggest medical mysteries of our time: How did HIV come to the U.S.? By genetically sequencing samples from people infected early on, scientists say they have figured out when and where the virus that took hold here first arrived.
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Humans Are Close To Killing Off Two-Thirds Of All Wildlife In Just 50 Years Many species, including the African elephant, have suffered widespread population declines in the last half century. A damning new report from the World Wildlife Fund has found a precipitous decline in the world's animal populations as thousands of ...
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This 3D-Printed Material Shrinks When Heated Most solid materials expand when heated. Using a 3D printing process known as projection microstereolithograpy, researchers made a metamaterial that shrinks when exposed to heat.
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