Glacial ice is formed from snow accumulating and compacting over millennia. As the pressure increases, crystalline layers are smoothed into one of the clearest substances found in nature. That alchemy—and the knowledge that climate change is causing glaciers to rapidly disappear—inspired 44-year-old artist Tristan Duke to create a photo lens out of glacial ice. “I just felt this real sense of urgency,” Duke says. He wanted to capture a glacier through its own “eye,” as he puts it, like a self-portrait.