Search our collection of background (non-event) articles from news media, science journals and other sources.
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| 7 | 3 | 1 | 1 | 6 | 2 | 1 | 1 | 1 | 3 | 2 |
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| WINTER | 12 | |
| SUMMER | 6 | |
| FALL | 4 | |
| SPRING | 1 |
| United States | 16 | |
| Canada | 1 |
Observations From Members