For centuries, humans have gazed at the stars and wondered whether we are alone in the universe. The question of ...
In Earth's fossil record, soft-bodied organisms like jellyfish rarely stand the test of time. What's more, it's hard for any ...
Solar wind (yellow-orange trails) strips ions from Earth’s upper atmosphere (sky-blue trails). Some of these particles travel along Earth’s magnetic field lines (solid white curves) and settle on the ...
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