Search our collection of background (non-event) articles from news media, science journals and other sources.
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1 | 1 | 1 | 1 | 1 | 18 | 20 | 7 | 3 | 1 | 4 | 2 |
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SUMMER | 18 | |
SPRING | 16 | |
FALL | 14 | |
WINTER | 7 |
United States | 15 | |
Canada | 2 | |
Mexico | 2 | |
Ecuador | 1 | |
Russia | 1 | |
Svalbard and Jan Mayen | 1 |