Search our collection of background (non-event) articles from news media, science journals and other sources.
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11 | ||
5 | ||
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58 | ||
23 | ||
22 | ||
16 | ||
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12 | ||
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28 | 30 |
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5 | 2 | 3 | 6 | 11 | 4 | 7 | 5 | 4 | 2 | 4 | 5 |
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SUMMER | 7 | |
FALL | 4 | |
SPRING | 3 |
United States | 25 | |
Canada | 5 | |
Italy | 1 | |
Russia | 1 |