long, straight line that does not resemble the curves of the Serpent Mound. Numerous other supernovas may have occurred over the centuries that span the possible construction dates of the effigy, though these two influences remain the most prominent theories. The mound is located on the site of a classic astrobleme, an ancient meteorite impact structure. When attempting to understand the impact origin of this structure, the pattern of disruption of sedimentary strata has provided archaeologists with a lot of information. In the center of the structure, strata have been uplifted several hundred feet, resembling the central uplifts of the Copernicus lunar crater. In 2003 geologists from Ohio State University and the University of Glasgow (Scotland) corroborated the meteorite impact origin of the structure at The Serpent Mound. They had previously studied core samples collected at the site in the 1970s, providing them with a background of information pertaining to the site. Further analyses of the rock core samples indicated that the impact occurred during the Permian Period, about 248 to 286 million years ago. This has led archaeologists to believe that the topographic expression of this impact or the impact crater, has been completely erased by erosion. In 1987, Clark and Marjorie Hardman published their finding that the oval-to-head area of the serpent is aligned to the summer solstice sunset. A depiction of the serpent mound appeared in The Century periodical in April 1890, drawn by William Jacob Baer. According to archaeologist Brad Lepper, Serpent Mound may be a depiction of a Dhegihan Siouan origin story of the Great Serpent "Toothy Mouth”, lord of the Beneath World, who impregnated the First Woman Preservation Ancient Monuments of the Mississippi Valley fascinated many across the country, including Frederic Ward Putnam of the Peabody Museum of Archaeology and Ethnology at Harvard University. Putnam spent much of his career lecturing and publishing on the Ohio mounds, specifically the Serpent Mound. When he visited the Midwest in 1885, he found that plowing and development were destroying many of the mounds, removing significant history of these cultures and their burial sites. In 1886, with help from a group of wealthy women in Boston, such as The Glass Flowers' patroness Mary Lee Ware, Putnam raised funds to purchase 60 acres (240,000 m2) at the site of The Serpent Mound in hopes to ensure its preservation. Along with The Serpent Mound, the purchase also contained three conical