Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SPRING | 18 | |
| SUMMER | 17 | |
| WINTER | 14 | |
| FALL | 7 |
| United States | 26 | |
| Canada | 10 | |
| China | 2 | |
| Norway | 2 | |
| Estonia | 1 | |
| Greenland | 1 | |
| Poland | 1 | |
| Russia | 1 | |
| Svalbard and Jan Mayen | 1 | |
| Sweden | 1 | |
| United Kingdom | 1 |
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