Search our collection of background (non-event) articles from news media, science journals and other sources.
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33 | ||
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11 | 30 |
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10 | 2 | 3 | 4 | 6 | 3 | 2 | 2 | 3 | 4 | 2 |
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FALL | 2 | |
WINTER | 1 |
United States | 21 | |
Canada | 2 | |
Russia | 1 |