A gigantic scorpion-shaped mound built centuries ago in Mexico may align with the winter and summer solstices, a new study finds.
Archaeologists documented the 205-foot-long (62.5 meter) mound in 2014 while surveying prehistoric irrigation systems in Tehuacán Valley, about 160 miles (260 kilometers) southeast of Mexico City. Several artifacts and offerings were found at the scorpion mound, which helped the team date it to the Late Classic and Early Postclassic periods (circa A.D. 600 to 1100).
