Xavier Murillo in the Andes Mountains
Xavier Murillo interned in Chile over the summer—and got the chance to hike the Andes Mountains.

Physics’ James Van Orman explains the complex nature of dating mountain ranges

What’s the oldest mountain range in the world? (How about the youngest?)

LiveScience: James Van Orman, professor of geochemistry and physics, revealed how determining the relative age of different mountain ranges around the world can be tricky.