On May 22, NASA launched the latest GRACE spacecraft: its something of a followup to the Gravity Recovery and Climate Experiment.  When in orbit, it will be able to monitor Earth’s water – everything on the surface, in ice and even underground./READ MORE// Mysterious Chunk of Space Trash is on a Collision Course With Earth

There’s more stories from 2018.  Check out the Best of 2018 series here.

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