When archaeologists excavated the northwest portion of the pyramid, they unearthed the skeletons of 21 people, who may have been from groups Tiwanaku conquered, according to Young-Sánchez's book.

“Bille” is the first-ever monostable tetrahedron, or a pyramid-like shape with four triangular faces that has one stable ...

A team of researchers has successfully built a strange four-faced pyramid named Bille that always lands on the same face—no ...

During its peak, from 100 BC to 650 AD, Teotihuacan had a population of 100,000 people or more, drawn from some of Mexico’s ...

A look at the status of the manatee population in Florida, and the latest in efforts to clean up the waters where manatees congregate. (AP File Photo/John Raoux, File) ...