Search our collection of background (non-event) articles from news media, science journals and other sources.
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25 | 9 |
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5 | 1 | 3 | 3 | 1 | 3 | 7 | 2 | 2 | 3 | 4 |
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SUMMER | 7 | |
FALL | 2 | |
WINTER | 2 | |
SPRING | 1 |
United States | 23 | |
Iceland | 1 | |
Norway | 1 | |
Russia | 1 |