Jim Elser scanned the snowfields clinging to the lower slopes of Clements Mountain in Montana’s Glacier National Park. While nearby tourists snapped pictures of soaring rock faces and searched for ...

LAKEWOOD, Colo. — There is a kind of polar process happening in the parking lots on the Front Range. Over time, snow turns to ice. And the icier a pile of snow gets, the harder and denser it becomes.

Have you heard about scientists who drill ice cores? Ice cores are samples taken from glaciers using special machines that go deep down into the glacier and take out solid tubes of ice and bring them ...