Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SUMMER | 11 | |
| FALL | 4 | |
| SPRING | 2 | |
| WINTER | 1 |
| United States | 20 | |
| Canada | 2 | |
| Norway | 2 | |
| China | 1 | |
| Poland | 1 | |
| Russia | 1 | |
| United Kingdom | 1 |
Observations From Members