CLAYTON, Iowa - The Sny Magill Unit of Effigy Mounds National Monument is a hidden wonder. A dozen miles downstream from the park's visitor center along the Mississippi River, the path starts with ...

The mounds are just north of what’s known as the Martian dichotomy, a natural boundary between the shallow plains of the northern hemisphere and the soaring highlands of the southern hemisphere.

ESA/ TGO/ CaSSIS The mounds lie north of a feature of Mars known as the Martian dichotomy, where the towering, ancient highlands of the southern hemisphere give way to shallower, younger plains that ...

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 ...

Spencer said the mounds are an important and overlooked part of St. Louis, and preserving Sugarloaf is vital. “This is a really special place to the Osage history and to our Native American ...