Search our collection of background (non-event) articles from news media, science journals and other sources.
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11 | 11 |
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4 | 2 | 1 | 4 | 1 | 2 | 1 | 1 | 4 | 2 |
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SPRING | 2 | |
SUMMER | 2 | |
WINTER | 2 | |
FALL | 1 |
United States | 16 | |
Iceland | 1 | |
Russia | 1 |