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Artist's impression of the Cryosat 2 satellite

Satellite keeps its eye on ice

Watch this video of the launch of the Cryosat 2 satellite.

Comet crash caused climate change?

Comet crash caused climate change?

Impacts by comet fragments could have cooled the Earth and wiped out species.

Image of Crane Glacier on the Larsen B Ice Shelf on April 6, 2002

Antarctic glacier retreats

Satellite images show a glacier crumbling into thousands of pieces.

Earth seen from space

Earth was wet in its youth

Extreme greenhouse gases weren’t needed to keep Earth from freezing.