But Hopewell mounds were made with earth ... Later, it was credited to the Fort Ancient culture, which followed Hopewell, thanks to the carbon dating of some artifacts. But the most recent ...

Over 15,000 mounds ... give the Earth its continents and ocean basins, but Mars has no plate tectonics of its own,” Joe explains. “This means it’s difficult to explain why the southern highlands of ...

Nowadays, students on the LSU campus pay little attention to the dramatic, sloping grassy backdrop on their path to class: the more than 6,000-year-old North American earthen mounds. The mounds ...

"It's possible that this might have come from an ancient northern ocean on Mars." Thousands of hills and mounds on Mars have ... but can we get to it? On Earth — for example, in the western ...

Mysterious mounds ... Mars' ancient past, scientists are uncovering the story of a planet that may have once been capable of supporting life. “Mars is a model for what the early Earth might ...