The United States Geological Survey has released a mobile-friendly interactive geological map of the lower 48 states and it's completely free to use.
Researchers used drones to get another look at the "Band of Holes" along Monte Sierpe, and their work suggests that the Inca ...
Among the early Maya, the site of Aguada Fénix would have been a place for everyone to gather for trade, socialization, and ritual ceremonies.
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