Think snow and ice can't exist outside of the winter season? Think again. At any given time and season, various forms of ice—including glaciers, ice sheets, and sea ice—cover about 10% of Earth's land ...

Earth's valleys tell an ancient story of ice and power. Over millions of years, massive glaciers have carved, sculpted, and transformed the landscape in ways that still take researchers' breath away.

20,000 years ago, during the last glacial maximum, hulking formations of flowing ice stretched across the Southern Rocky Mountains in present-day Colorado. Most of those glaciers melted away by around ...