Search our collection of background (non-event) articles from news media, science journals and other sources.
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FALL | 46 | |
SUMMER | 41 | |
SPRING | 32 | |
WINTER | 30 |
United States | 84 | |
Canada | 14 | |
Norway | 7 | |
Mexico | 3 | |
Sweden | 3 | |
Denmark | 2 | |
Greenland | 2 | |
Iceland | 2 | |
Russia | 2 | |
Svalbard and Jan Mayen | 2 | |
Afghanistan | 1 | |
Australia | 1 | |
Ecuador | 1 | |
Greece | 1 | |
Italy | 1 | |
Japan | 1 | |
Nigeria | 1 | |
Switzerland | 1 | |
Ukraine | 1 | |
United Kingdom | 1 |