A study published in archaeological review Antiquity explains that lowly llama droppings provided the basis for the growth of Incan society.

The president of Peru said Friday that Yale University has agreed to return thousands of artifacts that had been taken away from the Inca citadel of Machu Picchu almost a hundred years ago.

Archeologists said on Wednesday that a pre-Incan mummy and eight other skeletons have been dug up from under what is thought to have been a shantytown in the middle of Peru's capital.

Archeologists excavating a site in northern Peru have stumbled upon the roughly 600-year old remains of almost three dozen humans, who appear to have been ritualistically sacrificed by the Incas.

The government of Peru has sued Yale University in the U.S. courts seeking the return of Incan mummies, bones and pottery excavated decades ago. Hiram Bingham III, a Yale lecturer in South American history and future U.S.