Glaciers form when snow stays in the same area all-year-round, where eventually enough snow will turn it to ice due to the compression - and there's currently around 200,000 of them in the world.

This is where a glacier, a massive river of flowing ice, forms. Glaciers form the corrie when more and more snow piles up. The snow gets squashed under its own weight and is compacted into hard ice.

The new study highlights the importance of closely monitoring glacier surges and any lakes that subsequently form, in an effort to reduce potential future damage. Lead author, Dr. Harold Lovell ...