(3)In a new Archaeology(1) article, Smithsonian anthropologist Jane MacLaren Walsh shares her quest to uncover the origins of crystal skulls. Crystal skulls first surfaced in museums during the second half of the 19th century and were attributed to various "ancient Mesoamerican" cultures. Walsh's own adventure began sixteen years ago, when she was called in to examine a hollow rock-crystal skull (pictured) sent to the museum anonymously. An accompanying letter suggested it the 30-pound, 10-inch-high artifact was of Aztec origin. "Although nearly all of the crystal skulls have at times been identified as Aztec, Toltec, Mixtec, or occasionally Maya, they do not reflect the artistic or stylistic characteristics of any of these cultures," Walsh writes. What else did Walsh discover about the crystal skulls? Where did they come from, and why were they made? Find our more at archaeology.org(2).