Going greener: Finland's new gas-fuelled icebreaker

The steel behemoth pushes ahead, crunching the ice as it navigates the northernmost tip of the Baltic, considered one of the most polluted seas in the world. But unlike other icebreakers spewing diesel, this state-of-the-art ...

Image: ICESat-2 reveals profile of ice sheets

Less than three months into its mission, NASA's Ice, Cloud and land Elevation Satellite-2, or ICESat-2, is already exceeding scientists' expectations. The satellite is measuring the height of sea ice to within an inch, tracing ...

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