Search our collection of background (non-event) articles from news media, science journals and other sources.
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18 | 7 |
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1 | 1 | 4 | 7 | 2 | 3 | 7 |
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SPRING | 7 | |
SUMMER | 2 |
United States | 3 | |
Norway | 2 | |
Ireland | 1 | |
Poland | 1 | |
United Kingdom | 1 |