Atahualpa, the last Incan emperor, was seized by troops in 1532 during the Spanish Conquest, but smallpox had already devastated the Inca Empire around 1524–1528.Credit: Florilegius/Alamy More than 400 years ago, two people living in modern day Chile died while infected with the smallpox virus. Viral DNA found in their mummified remains has now yielded
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Three startups are providing the fireworks for the Department of Energy’s Fourth of July celebrations as it meets a major nuclear milestone. They have fired up new reactors as part of a pilot program aimed at boosting what Energy Secretary Chris Wright calls “America’s nuclear renaissance” to develop and deploy the next generation of atomic