Machu Picchu Is Older Than Experts Have Long Thought, Study Finds

Machu Picchu, the Inca palace tucked away in the mountains of Peru, may be a quarter-century older than previously thought. According to a new study published in Antiquity this month, a team of researchers used advanced radiocarbon dating to determine that the site was in use from 1420 to 1530 C.E.
Using accelerator mass spectrometry (AMS) the team was able to date human remains from Machu Picchu with very little surviving organic matter. Testing 26 individuals found in three cemeteries, they es