Historians and divers are trying to retrieve prehistoric clues from beneath the waves—but they have to act fast.

Introduction : our cultural Amnesia -- Adena, first civilizers of North America -- Who were the Adena? -- The keltic fingerprint on prehistoric America -- Hopewell masters of ceremony -- Who were the ...

For centuries, civilizations have risen, advanced, and eventually faded into history. However, there’s one civilization whose incredible achievements leave even the world’s leading scientists in awe ...

Across deserts, jungles, and polar ice, new discoveries are quietly stretching the story of civilization further back in time than many of us learned in school. As archaeologists debate mysterious ...