Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SUMMER | 9 | |
| SPRING | 7 | |
| FALL | 1 |
| United States | 22 | |
| Canada | 4 | |
| Norway | 2 | |
| Ireland | 1 | |
| Russia | 1 | |
| Spain | 1 |
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