Joshua Rapp Learn is an award-winning D.C.-based science journalist who frequently writes for Discover Magazine, covering topics about archaeology, wildlife, paleontology, space and other topics. View ...

The massive object at the heart of Mexico’s largest and most popular museum is so mysterious that nobody knows quite what to call it. The label on its pedestal reads “Piedra del Sol,” or “Stone of the ...

Since 1998, the Dickinson Hall Courtyard at the University of Florida has been missing a key piece to its 30-year-old design. But Monday, nine men lowered a large Aztec calendar onto its home, ...