Search our collection of background (non-event) articles from news media, science journals and other sources.
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44 | 47 |
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6 | 5 | 4 | 8 | 5 | 6 | 19 | 12 | 4 | 10 | 4 | 8 |
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SUMMER | 16 | |
FALL | 3 | |
WINTER | 2 | |
SPRING | 1 |
United States | 44 | |
Canada | 8 | |
Iceland | 2 | |
Russia | 2 |