Search our collection of background (non-event) articles from news media, science journals and other sources.
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14 | ||
12 | ||
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1 |
9 | 18 | 9 |
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FALL | 7 | |
WINTER | 1 |
United States | 20 | |
Canada | 3 | |
Russia | 1 | |
Trinidad and Tobago | 1 |