Search our collection of background (non-event) articles from news media, science journals and other sources.
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5 | 34 | 11 |
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7 | 2 | 5 | 4 | 3 | 2 | 5 | 7 | 5 | 2 | 4 | 4 |
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SUMMER | 9 | |
WINTER | 5 | |
SPRING | 4 | |
FALL | 2 |
United States | 31 | |
Canada | 3 | |
Iceland | 2 | |
Norway | 1 | |
Russia | 1 |