Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SUMMER | 15 | |
| SPRING | 6 |
| United States | 30 | |
| Canada | 9 | |
| Russia | 3 | |
| China | 1 | |
| Iceland | 1 | |
| Italy | 1 |
Observations From Members