Search our collection of background (non-event) articles from news media, science journals and other sources.
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19 | ||
12 | ||
10 | ||
6 | ||
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73 | ||
38 | ||
20 | ||
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10 | ||
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21 | 7 | 34 | 11 |
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10 | 3 | 7 | 7 | 5 | 3 | 8 | 8 | 9 | 4 | 4 | 5 |
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SUMMER | 14 | |
SPRING | 11 | |
WINTER | 10 | |
FALL | 7 |
United States | 38 | |
Canada | 8 | |
Iceland | 2 | |
Norway | 2 | |
Russia | 2 | |
Saint Vincent and the Grenadines | 1 |