Search our collection of background (non-event) articles from news media, science journals and other sources.
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33 | 12 |
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3 | 1 | 2 | 11 | 6 | 4 | 5 | 1 | 1 | 3 | 4 | 4 |
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SPRING | 6 | |
SUMMER | 5 | |
FALL | 3 | |
WINTER | 1 |
United States | 21 | |
Canada | 2 | |
Iceland | 2 | |
Norway | 1 |