Pre-Columbian History
The stones are believed to have been carved between 200 BC and 1500 AD. However the only method available for dating the carved stones is stratigraphy, and most stones are no longer in their original locations. The culture of the people who made them disappeared after the Spanish conquest.
Spheres have been found with pottery from the Aguas Buenas culture (dating 200 BC – AD 600) and also they have been discovered with Buenos Aires Polychrome type sculpture (dating 1000 – AD 1500). They have been uncovered in a number of locations, including the Isla del Caño, and over 300 kilometres (190 mi) north of the Diquís Delta in Papagayo on the Nicoya Peninsula.
Read more about this topic: Stone Spheres Of Costa Rica
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“Philosophy of science without history of science is empty; history of science without philosophy of science is blind.”
—Imre Lakatos (1922–1974)