Search our collection of background (non-event) articles from news media, science journals and other sources.
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1 |
11 | 22 | 21 | 32 | 14 | 4 |
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SUMMER | 16 | |
SPRING | 3 | |
FALL | 2 |
United States | 40 | |
Canada | 10 | |
Russia | 4 | |
China | 1 | |
Iceland | 1 | |
Italy | 1 |