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Trudging through waist-deep snow on the 24,688-foot Annapurna IV mountain, Tonya George Riggs couldn’t get one thought out of her mind: they were alone.

The editor's note from the fall 2009 issue.

Letters to the editor from the fall 2009 issue.

Forever Buffs who have passed away.

Students travel the world to make a difference.

CU investigators discovered the first evidence of shorelines on Mars in June, indicating a deep, ancient lake. A Holy Grail of sorts, the finding could help scientists zero in on evidence of past life on the planet.

John E. Roberts has visited 183 countries and aims to travel to the 23 remaining. While his trips were initially paid for through the Peace Corps and the U.S. State Department, these days they’re on his own dime.

Whether hiking in the mountains or walking in space, astronaut Steve Swanson’s life is full of adventure.

Combine artistic creativity and a love of science, add a dollop of inspiration, season with whimsy and a sense of humor and you have Julie Peasley’s recipe for success in crafting a geek gift teaching tool — the Particle Zoo.

An image from the fall 2009 issue.