Dear Kenton,

When I think about the Arctic, I picture frigid waters filled with narwhals, polar bears and icebergs.

I asked my friend Von Walden how those icebergs got there. He’s a polar scientist at Washington State University.

He told me a glacier is a huge mass of ice on land. But glaciers don’t just sit there. They move. A glacier is like a slow-moving river of ice. It’s made of heavy, compacted snow. It flows over the land because of its own weight.

An iceberg is a broken-off piece of a glacier.

To be an iceberg, that broken-off chunk must be … » More …

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