Sentinel
A Massive Lake Suddenly Vanished In Antarctica, Scientists Discover
A lake twice the volume of San Diego Bay disappeared within three days, a finding that could have implications for understanding climate change in Antarctica.
The Sluggish Race to Guard the Earth Against Meteors
In the last two decades NASA reported nearly 600 exploding meteorites, many as large as 60 feet, rattling the thermosphere like dynamite. Is anyone worried about that?
Copernicus Will Be Europe's All-Seeing Satellite Constellation
It's like a fitness monitor for the planet.
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