Search our collection of background (non-event) articles from news media, science journals and other sources.
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| 10 | 23 | 12 |
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| FALL | 11 | |
| WINTER | 3 |
| United States | 20 | |
| Canada | 7 | |
| Iceland | 1 | |
| Mongolia | 1 | |
| Russia | 1 | |
| Trinidad and Tobago | 1 |
Observations From Members