6 Mysterious Historical Objects That No One Can Explain

We will never know all of history's secrets. Case in point: these 6 historical artefacts that still baffle even the most learned historians and archaeologists. But this doesn't mean the search for the truth is over; this just makes it more challenging and even more interesting.
 

1. The giant stone spheres of Costa Rica

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2. The Baghdad Battery

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3. The Voynich Manuscript

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4. Incan Golden Figurines

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5. The Genetic Disc

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6. The Antikythera Mechanism