Search our collection of background (non-event) articles from news media, science journals and other sources.
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9 | 36 | 7 |
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10 | 3 | 1 | 1 | 2 | 6 | 1 | 2 | 5 | 8 | 13 |
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SUMMER | 5 | |
WINTER | 5 | |
FALL | 1 |
United States | 18 | |
Canada | 4 | |
Russia | 2 | |
Mongolia | 1 | |
Norway | 1 |