E`xcavations in Costa Rica have revealed a huge nearly perfect stone sphere, prompting experts to ask how that precision was achieved thousands of years ago.
“We have studied the terrain where there are more than 15 of these spheres, and some are located next to areas that give access to residential buildings as if they were placed there to welcome you.”
They were used as a sign of hierarchy, ethnic distinction, explains archaeologist Francisco Corrales of the National Museum of Costa Rica.
The massive stone spheres are known as the stone spheres of Diquis, a region south of Costa Rica, and were created between 300 AD by the ancestors of the Boruca culture, explains a publication in the Facebook publication at the National Museum from Costa Rica. .
These massive spheres were located in important settlements, forming sets or alignments and as part of the main architectural structures, to reinforce the prestige of a place and the position of power of the leaders.
THE LARGE NUMBER OF THESE SCULPTURES
The fine finish of its surface, its almost perfect sphericity, the variety of sizes, as well as the manufacturing process, the symbolism and the use in public spaces that turn them into exceptional archaeological artefacts, explains the Diquis website.
“It is an incredible opportunity to study these unique elements in the world and, in particular, the five partially buried spheres located in the archaeological zone of Finca 6,” says Mexican archaeologist and researcher Isabel Medina.
“We worked to free the spheres using an archaeological excavation to document their condition, both on the exposed surface and on the ground, with the aim of forming a record of the physical state of each one.”
ACCORDING TO MEDINA
The decision to keep the spheres half buried “has been adequate for its conservation in situ and its subsequent study”, which is already being carried out by a multidisciplinary team of the National Museum of Costa Rica.
The spheres have incredible perfection because “some reach 96 percent,” says Corrales, who also studies the instruments with which the spheres were built:
“We found the tools that were used near the spheres and the instruments that were used to smooth the stone, they were made of different materials, granite and gabbro rocks, limestone or sandstone, but above all gabbro”.
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