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High Above the Earth, Satellites Track Melting Ice
The surest sign of a warming Earth is the steady melting of its ice zones, from
disappearing sea ice in the Arctic to shrinking glaciers worldwide. Now, scientists are
using increasingly sophisticated satellite technology to measure the extent, thickness,
and height of ice, assembling an essential picture of a planet in transition.
Solar: the sky is the limit
This week’s record-breaking night flight by the Solar Impulse aircraft has been
widely acclaimed, but few of us are ever likely to fly in such a plane.
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