Why it matters
Stone balls, some over two metres, carved by the Diquís culture with a precision and purpose still only partly understood.
What mainstream says
Pre-Columbian Diquís work, made by pecking and grinding; the 'impossible perfection' is overstated.
The memory of it
The stone spheres of Costa Rica are hundreds of carved granodiorite balls, some over two metres across and strikingly round, made by the Diquis culture. Mainstream is clear that they were shaped by patient pecking and grinding and that their 'impossible perfection' is overstated — we accept this (grade A). Their relevance is twofold. First, much of the collection was bulldozed and moved before it could be studied, so a great deal of context is simply gone — a reminder of how easily the record is erased. Second, no one is certain what they were for, and that recurring 'we do not know why' is part of the pattern we track. We keep them as honest craft with an open question, not a mystery inflated past the evidence.
Sources & further reading
The authoritative reference for this site/finding — and its own primary citations — so you can check us.