Search our collection of background (non-event) articles from news media, science journals and other sources.
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| FALL | 8 | |
| WINTER | 3 |
| United States | 19 | |
| Canada | 6 | |
| Mongolia | 2 | |
| Iceland | 1 | |
| Russia | 1 | |
| Sweden | 1 | |
| Trinidad and Tobago | 1 |
Observations From Members