Search our collection of background (non-event) articles from news media, science journals and other sources.
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25 | ||
12 | ||
6 | ||
6 | ||
4 | ||
4 | ||
3 | ||
1 | ||
1 | ||
1 | ||
1 | ||
1 |
10 | ||
7 | ||
7 | ||
6 | ||
2 | ||
1 | ||
1 | ||
1 | ||
1 | ||
1 | ||
1 | ||
1 | ||
1 |
3 | 22 |
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2 | 1 | 4 | 2 | 4 | 6 | 1 | 2 | 2 | 1 |
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SUMMER | 7 | |
SPRING | 5 | |
FALL | 2 | |
WINTER | 2 |
United States | 9 | |
Canada | 4 |