Scientists studying glacial ice in Greenland drilled down 4,550 feet and concluded that the glacier was formed 2,000 years ago.
But that is pretty “new” ice if you compare it with the glaciers in Antarctica. These glaciers are estimated to have formed about 90,000 years ago, and have remained frozen since then!
About 250,000 years ago, a glacier moved south from Canada and dug out deep holes of earth and rock. When it melted and water filled these holes 15,000 years ago, it created the Great Lakes!