Search our collection of background (non-event) articles from news media, science journals and other sources.
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37 | ||
28 | ||
19 | ||
16 | ||
16 | ||
12 | ||
9 | ||
8 | ||
8 | ||
4 | ||
3 | ||
2 | ||
1 | ||
1 |
102 | ||
47 | ||
47 | ||
28 | ||
26 | ||
11 | ||
8 | ||
8 | ||
6 | ||
6 | ||
5 | ||
5 | ||
5 | ||
5 | ||
3 | ||
2 | ||
2 | ||
2 | ||
1 | ||
1 | ||
1 | ||
1 |
62 | 40 |
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17 | 6 | 9 | 10 | 13 | 9 | 8 | 5 | 8 | 8 | 8 | 1 |
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SPRING | 12 | |
WINTER | 10 | |
SUMMER | 7 | |
FALL | 6 |
United States | 49 | |
Canada | 7 | |
Russia | 3 |