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April 4, 2017

ExoTerra's electric propulsion system is based on the Hall effect. PR photo

ExoTerra presents - the engine that will bring small satellites to an asteroid

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Cod. Communicate using sounds. Photo: August Linnman.

Fish chatter

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A particularly hot summer in Alaska in 2004 caused the collapse of the permafrost seen in the photograph. Source: NPS Climate Change Response.

Thawing the ice freeze could accelerate global warming

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