Machu Picchu was built over major fault zones. Now, researchers think they know why

Source: Science MagazineArchaeologists and architects alike have long wondered why 15th century Incans built the grand citadel of Machu Picchu where they did, high in the remote Andes atop a narrow...

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In the world’s highest city, a lack of oxygen ravages the body

Source: Science MagazineON A COLD, GRAY MORNING earlier this year, Ermilio Sucasaire, a gold miner, sat in a white plastic chair with a stack of papers and a pen in his hand. His inquisitive eyes...

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How the people of the Andes evolved to live in high altitudes

Source: Science MagazineScarce oxygen, cold temperatures, and intense ultraviolet radiation make the Andes a tough place to live. How did humans adapt to such heights? A new study of ancient and...

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South America’s Inca civilization was better at skull surgery than Civil War doctors

Source: Science MagazineCranial surgery without modern anesthesia and antibiotics may sound like a death sentence. But trepanation—the act of drilling, cutting, or scraping a hole in the skull for...

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