These gaping glacier cracks are dramatic—and deadly. Here's how they form, plus three safe places to see crevasses up close.
Is quicksand as big of a threat as Hollywood tells us it is? Zion's chief park ranger gave us the truth (and tips on escaping quicksand...just in case).
Though microbursts are rare and usually fairly short-lived, these vertical hurricanes can cause extensive damage.
Hike into the epicenter of a cataclysmic explosion in New Mexico's Valles Caldera.
The science behind the sky's natural fireworks display–and how to see it.
From the northern lights to glacial crevasses, science meets spectacle in these fascinating features.