The use of seabird poop as a fertilizer for corn and other food crops supported the expansion of pre-Inca civilizations ...

In 1532, in the city of Cajamarca, Peru, Spanish conquistador Francisco Pizarro and a group of Europeans took the Inca ruler ...

But it wouldn’t have been possible without a teacher and his former student.

For nearly five centuries, something ancient has waited beneath Cusco, Peru’s cobblestone streets. While tourists photograph ...