Search our collection of background (non-event) articles from news media, science journals and other sources.
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77 | ||
60 | ||
45 | ||
45 | ||
40 | ||
32 | ||
25 | ||
17 | ||
14 | ||
14 | ||
13 | ||
11 | ||
3 | ||
3 | ||
2 | ||
1 | ||
1 | ||
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70 | ||
67 | ||
52 | ||
44 | ||
36 | ||
29 | ||
29 | ||
28 | ||
28 | ||
25 | ||
19 | ||
18 | ||
15 | ||
14 | ||
14 | ||
12 | ||
9 | ||
7 | ||
6 | ||
3 | ||
3 | ||
2 | ||
1 | ||
1 | ||
1 |
163 | 129 |
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30 | 11 | 15 | 22 | 22 | 20 | 36 | 25 | 24 | 36 | 27 | 24 |
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SUMMER | 39 | |
FALL | 18 | |
WINTER | 13 | |
SPRING | 7 |
United States | 113 | |
Canada | 24 | |
Russia | 8 | |
Norway | 6 | |
Iceland | 2 | |
Brazil | 1 | |
China | 1 | |
Ireland | 1 | |
Italy | 1 | |
Sweden | 1 | |
United Kingdom | 1 |