The easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is ...
The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the coldest ...
The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region.
From one population to the next, in a circular pattern, these salamanders are still able to interbreed successfully. However, where the circle closes -- in the black zone on the map in Southern ...
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