Search our collection of background (non-event) articles from news media, science journals and other sources.
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23 | 18 |
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10 | 3 | 7 | 4 | 6 | 1 | 3 | 1 | 1 | 1 | 4 |
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SPRING | 8 | |
SUMMER | 4 | |
FALL | 1 | |
WINTER | 1 |
United States | 17 | |
Norway | 3 | |
Canada | 1 |