Geologists can use cosmic rays from outer space to piece together the timing of past geologic events, like volcanic eruptions and glaciations. But how does this work? It turns out that rocks, like humans, can get a sunburn!

Measurements from recent mountaineering trips indicate Mount Rainier's summit has shrunk since 1998.

Roof issues, cracked pointing on historic stone work, and crooked doors and stuck windows recently were addressed at Fort Larned National Historic Site in western Kansas.

Gnarly and wizened, she can’t compete with Crater Lake’s impossibly blue beauty. Nor does she try as she stubbornly clings to life at the edge of the caldera. They quietly call her the Grandmother Tree but don’t mark the spot where she stands with her name or story.