Search our collection of background (non-event) articles from news media, science journals and other sources.
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26 | ||
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14 | ||
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51 | ||
39 | ||
36 | ||
25 | ||
25 | ||
14 | ||
11 | ||
7 | ||
5 | ||
5 | ||
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6 | 26 | 71 | 15 |
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10 | 7 | 12 | 15 | 10 | 16 | 6 | 6 | 7 | 10 | 14 | 5 |
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SUMMER | 20 | |
WINTER | 18 | |
SPRING | 16 | |
FALL | 11 |
United States | 47 | |
Canada | 5 | |
Norway | 4 | |
China | 2 | |
Russia | 2 | |
Ireland | 1 | |
Poland | 1 | |
Spain | 1 | |
United Kingdom | 1 |