If you couldn’t get enough of the cold temperatures in early December, there’s more on the way for Tennessee this coming weekend. A polar vortex is bringing Arctic air into the United States, and ...

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How a Finnish physicist named Karl Lemström once became obsessed with recreating the aurora borealis from scratch – and may ...

From Alpine ridges to cliffside trails and story-filled city loops, Europe’s most inspiring runs combine exertion and ...

Scientists warn rising temperatures, even incremental ones, are already destabilizing the climate and making storms, floods ...