some of the ice is filled with bubbles formed by volcanic gas rising from beneath the lake and gas generated from the decomposition of sunken vegetation. This produces beautiful patterns that are ...

As the frozen parts of our planet face rapid and unprecedented change, NSIDC has been sharing how and why its key features are changing.

Why did the ice ages that once transformed Earth every 40,000 years begin to occur less frequently? The planet now plunges into a deep freeze about once every 100,000 years, a pattern it has ...