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[:es]Archaeologists 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 ridge in what is now Peru. One simple answer, researchers now suggest, is that that’s where building materials for the site—large amounts of already fractured rock—were…

[:es] A giant data store quietly being built in India could free vast swathes of science for computer analysis — but is it legal? [:]

[:es]A DNA “knot” breaks several rules thought hard and fast. Now the race is on to understand it.[:]

[:es]A dark-matter detector picks up radioactive decay that takes place over trillions of years.[:]

[:es]New studies revise ideas about the symbiosis that gave mitochondria to cells and about whether the last common ancestor of all eukaryotes was one cell or many. [:]

[:es]Some twin-systems might be prime targets for alien life[:]

[:es]Nanofabbed bots are small enough to be delivered via syringe, raising all sorts of fantastic voyage possibilities. [:]

[:es]In an attempt to prove that the Turin Shroud—a strip of linen that some people believe was used to wrap Jesus’s body after his crucifixion and carries the image of his face—is real, researchers have strapped human volunteers to a cross and drenched them in blood. Most mainstream scientists agree the shroud is a fake…

[:es]Study finds stool transplants from some donors are far more effective than others[:]