For hundreds of years, Andean people recorded information by tying knots into long cords. Will we ever be able to read them?

Black-and-white photographs from Bingham's expeditions ... If Machu Picchu had been an Inca city, gold would have been plentiful. Since it was a royal retreat, the Inca rulers left their gold ...

Every spring, creepy black 'spiders' sprout up on Mars as buried carbon dioxide ice releases dusty geysers of gas. New ESA images show the phenomenon has begun in the strange Inca City formation.

Mars Express’s High-Resolution Stereo Camera captured the spider-like formations in the region of Mars called Inca City ... are longer than ours. These black, spider-like structures ...

Peruvian and British explorers say they have discovered a lost Inca city on a peak in the Andes that was used as a place of resistance against Spanish conquerors. This site may ultimately yield a ...