Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SUMMER | 18 | |
| FALL | 14 | |
| SPRING | 9 | |
| WINTER | 4 |
| United States | 21 | |
| Mexico | 3 | |
| Russia | 3 | |
| Ecuador | 1 | |
| Ireland | 1 | |
| Nigeria | 1 | |
| Sweden | 1 |
Observations From Members