Snow has once again returned to the Sierra Nevada, and that's good news -- not only for skiers but for the more than 400 glaciers that dot the range. Over hundreds of years, the annual snows have kept California's glaciers intact. But as we found on a recent expedition to Yosemite, that may be changing. Reporter: Sasha Khokha
View an audio slideshow of Sasha's trek to the Dana Glacier, and watch videos about how the shrinking glacier is being monitored. Explore more
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