Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SPRING | 86 | |
| WINTER | 76 | |
| SUMMER | 74 | |
| FALL | 36 |
| United States | 261 | |
| Canada | 46 | |
| Norway | 17 | |
| Russia | 13 | |
| Iceland | 6 | |
| Sweden | 4 | |
| Svalbard and Jan Mayen | 3 | |
| China | 2 | |
| Finland | 2 | |
| Ireland | 2 | |
| Mongolia | 2 | |
| Switzerland | 2 | |
| Brazil | 1 | |
| Cambodia | 1 | |
| France | 1 | |
| French Polynesia | 1 | |
| Italy | 1 | |
| Poland | 1 | |
| Spain | 1 | |
| Trinidad and Tobago | 1 | |
| United Kingdom | 1 | |
| Uzbekistan | 1 |
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