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

A forest that existed about 290 million years ago was found in Paraná, Brazil.

Treasure hunters have searched for the Holy Grail for centuries, and hundreds of people have claimed to possess it.

For Jill Tarter, who participates in the project to search for intelligent life beyond Earth, contact with alien civilizations is just a matter of time.

Whether this crazy-haired arthropod is a new species remains to be seen.

A new theory points out that two of the largest stones of the megalithic structure would have been at the site millions of years before the arrival of humans.

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

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