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Fossils found in Chile are from a strange-looking dog-sized dinosaur species that had a unique slashing tail weapon, scientists reported Wednesday.

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This image, provided by the Institute of Molecular Biology of the Austrian Academy of Sciences, shows a human “blastoid” created in a lab. A new study in Nature on Thursday, Dec. 2, 2021, shows how scientists created this structure that mimics a blastocyst, a ball of cells that form within a week of fertilization, and can be used in research. (Photo by Alok Javali, Heidar Heidari and Theresa Sommer/Institute of Molecular Biology of the Austrian Academy of Sciences via AP)

AP
  • Updated

This image, provided by the Institute of Molecular Biology of the Austrian Academy of Sciences, shows a human “blastoid” created in a lab. A new study in Nature on Thursday, Dec. 2, 2021, shows how scientists created this structure that mimics a blastocyst, a ball of cells that form within a week of fertilization, and can be used in research. (Photo by Alok Javali, Heidar Heidari and Theresa Sommer/Institute of Molecular Biology of the Austrian Academy of Sciences via AP)