Space laser to track Earth's ice
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Space laser to track Earth's ice

The American space agency is about to put a laser in orbit to measure the condition of Earth's ice cover. The satellite mission, called ICESat-2, should provide more precise information on how these frozen surfaces are being affected by global warming. Tom Neumann, Nasa's ICESat-2 deputy project scientist, discussed the mission with our correspondent Jonathan Amos.

  • 14 Sep 2018