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Scientists have come up with 12 hypotheses why we haven't detected signs of alien civilizations yet.

So far, no one can explain what these brands are and what their origins.

The archaeological site of Temehea Tohua on the Polynesian island of Nuku Hiva has a series of strange statues that defy conventional explanations.

The southern Amazon was covered in a network of large villages and ceremonial centers before Europeans arrived.

Image emerged at a moment in the space race.

For decades, the mystery of the "Sailing Stones" has left many scientists puzzled and unanswered.

One of the most important sites investigated in the region of ancient Anatolia.

The structure was abandoned more than a thousand years ago without ever being used.