10 Unexplained Archaeological Discoveries

Occasionally, archaeologists unearth items that leave even leading experts completely stumped.

Occasionally, archaeologists unearth items that leave even leading experts completely stumped. From the Ancient Greek Antikythera Mechanism - known as the first ever computer - to the hundreds of mysterious stone spheres scattered across Costa Rica, Alltime10s brings you 10 of the most bizarre, perplexing discoveries from history. 

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