Search our collection of background (non-event) articles from news media, science journals and other sources.
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| WINTER | 23 | |
| FALL | 19 | |
| SPRING | 16 | |
| SUMMER | 16 |
| United States | 60 | |
| Canada | 9 | |
| Norway | 5 | |
| Iceland | 3 | |
| Russia | 3 | |
| Spain | 2 | |
| Greenland | 1 | |
| Nepal | 1 | |
| Nigeria | 1 | |
| United Kingdom | 1 |
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