Webtwo centuries of excavations on six continents have given voice to a past that previously lay mostly hidden.

Now breakthroughs in technology promise even more.

It tells of a people desperately trying to adapt to a changing climate that would ultimately.

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Nine remain under the ground.

Webdecades ago, an artist buried 12 treasures across north america.

One treasure hunter thinks he's cracked the code and found.

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