Search our collection of background (non-event) articles from news media, science journals and other sources.
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41 | ||
22 | ||
20 | ||
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16 | ||
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13 | ||
8 | ||
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1 |
139 | ||
57 | ||
55 | ||
36 | ||
35 | ||
15 | ||
11 | ||
9 | ||
9 | ||
9 | ||
8 | ||
7 | ||
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5 | ||
3 | ||
3 | ||
3 | ||
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2 | ||
2 | ||
1 | ||
1 | ||
1 | ||
1 |
10 | 26 | 63 | 40 |
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21 | 9 | 11 | 12 | 15 | 15 | 12 | 9 | 11 | 9 | 10 | 5 |
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WINTER | 21 | |
SUMMER | 20 | |
SPRING | 14 | |
FALL | 11 |
United States | 73 | |
Canada | 10 | |
Russia | 3 |