Around A.D. 1250, seeking refuge from some unknown threat, the Anasazi migrated from open villages to nearly inaccessible dwellings. A generation later, they moved again. Douglas Merriam In 1874 ...

YAMAGATA--Researchers here have discovered 168 more ancient geoglyphs, where lines drawn across stretches of earth form images that can be seen from overhead, in Nazca, Peru. The team from ...