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Dental caries, or tooth decay, is the most widespread noncommunicable disease worldwide. According to the Centers for Disease Control and Prevention, more than $45 billion is lost in productivity in the U.S. each year, with untreated dental diseases as the number one cause. Scientists have long struggled to study the composition and structure of tooth...

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Conaculta As part of a restoration project, archaeologists in Mexico City recently excavated a portion of Huei Tzompantli—an ancient Aztec tower, which sits below street level. During the process, they unearthed 119 human skulls embedded in a wall. While definitely momentous, it’s not wholly surprising. As tzompantli is essentially a giant rack that the Aztec used to display skulls from human sacrifices and prisoners of war. In the five years since Huei Tzompantli was first discovered, researchers have already counted 484 skulls within the structure, which was likely built sometime betwe...

Under wraps: X-rays reveal 1,900-year-old mummy’s secrets Results of noninvasive tests at Argonne National Laboratory point to a new way to study mummified specimens December 09, 2020 This is the first time an intact mummy was examined using X-ray diffraction techniques. The mummified remains of ancient Egyptians hold many secrets, from the condition of the bodies to the artifacts placed within the burial garments. Now a team of researchers has found a way to unwrap those secrets, without unraveling the mummies themselves. Three years ago, researchers from Northwestern, in preparation fo...