Search our collection of background (non-event) articles from news media, science journals and other sources.
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1 | 4 | 18 | 24 | 19 | 96 | 24 |
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WINTER | 39 | |
SPRING | 32 | |
SUMMER | 29 | |
FALL | 16 |
United States | 113 | |
Canada | 24 | |
Norway | 9 | |
Iceland | 7 | |
Russia | 7 | |
Brazil | 1 | |
China | 1 | |
French Polynesia | 1 | |
Ireland | 1 | |
Japan | 1 | |
Nepal | 1 | |
Poland | 1 | |
Spain | 1 | |
Sweden | 1 |