Search our collection of background (non-event) articles from news media, science journals and other sources.
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17 | 8 | 56 | 17 |
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12 | 9 | 8 | 14 | 10 | 8 | 7 | 1 | 9 | 4 | 9 | 7 |
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WINTER | 19 | |
SPRING | 16 | |
FALL | 11 | |
SUMMER | 6 |
United States | 34 | |
Canada | 9 | |
Norway | 3 | |
Russia | 3 | |
China | 1 | |
Poland | 1 | |
Svalbard and Jan Mayen | 1 |