Search our collection of background (non-event) articles from news media, science journals and other sources.
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26 | 27 |
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5 | 2 | 3 | 6 | 9 | 3 | 5 | 5 | 4 | 2 | 4 | 5 |
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SUMMER | 6 | |
FALL | 4 | |
SPRING | 3 |
United States | 23 | |
Canada | 5 | |
Russia | 1 |