Search our collection of background (non-event) articles from news media, science journals and other sources.
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| SUMMER | 91 | |
| SPRING | 88 | |
| WINTER | 72 | |
| FALL | 32 |
| United States | 262 | |
| Canada | 40 | |
| Norway | 17 | |
| Russia | 12 | |
| Svalbard and Jan Mayen | 5 | |
| Iceland | 4 | |
| Sweden | 3 | |
| China | 2 | |
| Finland | 2 | |
| Ireland | 2 | |
| Switzerland | 2 | |
| Brazil | 1 | |
| Cambodia | 1 | |
| France | 1 | |
| French Polynesia | 1 | |
| Italy | 1 | |
| Poland | 1 | |
| Spain | 1 | |
| United Kingdom | 1 | |
| Uzbekistan | 1 |
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