Machu Picchu was built by the Incas, one of several cultures that settled in the Central Andes over thousands of years. Matthew Butcher By Elizabeth PennisiMay. 7, 2020 , 12:00 PMSome of the world’s more famous and closely examined archaeological sites pepper the hillsides of the Central Andes, documenting an invention of farming and the…
By Donna Lu This Martian cliff may have been cut by hundreds of thousands of years of water flowing over itFaculty of Geosciences, Utrecht University We know from images of Mars’s surface that the planet once had plenty of flowing water, but now we’ve found the first evidence of a river that flowed there for…
By Colin Barras A dagger from the tomb of the pharaoh Tutankhamun is made of meteoritic ironrobertharding / Alamy The sky is an enormous iron container filled with water and chunks of it occasionally fall off and plummet to Earth as iron meteorites. Or, at least, that’s what ancient Egyptians seem to have thought. Iron…
By Michael Le Page When archaeologists find ancient faeces, knowing who left it is important Tim Wright/Getty Images Dog faeces can still be troublesome thousands of years after being dumped. Archaeologists can end up in deep doodoo if they mistake it for human faeces. But now an artificial intelligence system has been developed to discern…
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The agency has authority over meat, poultry and processed egg products. Published: April 01, 2026, 12:05 am The USDA’s Food Safety and Inspection Service has released a report on outbreaks it investigated during fiscal year 2025, showing that Listeria monocytogenes was the most frequent cause of outbreaks. The agency defines an outbreak as an incidence
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