Shasta Valley's strange hills reveal a secret — the debris of a massive ancient mountain collapse in Northern California.

Cerro El Cono is a solitary, pyramidal hill in the Peruvian Amazon rainforest whose origins remain mysterious and that holds ...

Geologists led by the University of Maryland and the University of Hawaiʻi finally connected the dots between one of the ...

From Lowell Observatory in Flagstaff to Mount Lemmon near Tucson, here are the most recommended locations places for ...