Search our collection of background (non-event) articles from news media, science journals and other sources.
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10 | 46 | 23 |
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7 | 4 | 9 | 11 | 3 | 19 | 7 | 4 | 5 | 2 | 7 | 1 |
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SUMMER | 15 | |
SPRING | 10 | |
WINTER | 10 | |
FALL | 2 |
United States | 32 | |
Canada | 5 | |
Norway | 2 | |
Russia | 2 | |
Spain | 1 |