This is SeaTalk: Ocean News from the University of Delaware.

If you’ve ever seen a glacier, either in real life or in a photo, you know they can be huge. These large sheets of slowly moving ice vary in size but can be more than 100 miles long. The world’s glaciers — which are found in mountain ranges and Earth’s polar regions — store about 75 percent of the world’s fresh water. Scientists who study ice in the environment are known as glaciologists. At UD, they are researching how climate change, human activity, and natural environmental cycles may affect the growing and shrinking of glaciers and sea ice. These scientists play an important role in helping us understand the effect that melting glaciers could have on our oceans.

This is SeaTalk, a public service announcement from the University of Delaware, the Delaware Sea Grant College Program, and this station.