A Polar vortex has covered the Philadelphia region under a canopy of frigid temperatures, but many people may not realize what a Polar vortex actually is, and the dangers — like frostbite — such ...
In order to understand the massive changes afoot in the warming polar regions, oceanographer Allison Fong is hunting for the tiniest clues. Scientist Allison Fong removes an ice block from a floe in ...
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