Search our collection of background (non-event) articles from news media, science journals and other sources.
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4 | 41 | 28 |
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5 | 1 | 11 | 8 | 7 | 11 | 7 | 7 | 6 | 5 | 2 | 3 |
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SUMMER | 13 | |
SPRING | 11 | |
FALL | 3 | |
WINTER | 3 |
United States | 30 | |
Canada | 6 | |
Norway | 3 | |
Ireland | 1 | |
Italy | 1 | |
Russia | 1 | |
Spain | 1 |