How do glaciers form?

Glaciers form in regions where snowfall exceeds snowmelt over many years. Layers of snow accumulate and compress into dense ice due to the weight of the overlying snow. This process can take decades or even centuries. Glaciers move slowly under their own weight, shaping the landscape by eroding rock and transporting debris. They are vital for regulating global climate and serve as freshwater reservoirs, but many glaciers are shrinking due to climate change.