In Clive Cussler’s thriller Inca Gold, a crucial clue in an international treasure hunt is encoded in an ancient tangle of knotted, colored strands. Using a computer to identify patterns, an expert ...

Cut the twine or string into eight equal lengths of approximately 24-34 inches, depending on how large your container is. Knot the ends. Keep creating a row of knots by repeating this step two to four ...

You have reached your maximum number of saved items. Remove items from your saved list to add more. Lima: In a dry canyon strewn with the ruins of a long-dead city, archaeologists have made a ...

CAMBRIDGE, Mass. -– Anthropologists at Harvard University have found evidence that ancient Inka accountants shared numbers across their sprawling bureaucratic hierarchy using khipu, aggregations of ...