Search our collection of background (non-event) articles from news media, science journals and other sources.
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| 257 23% | ||
| 171 15% | ||
| 167 15% | ||
| 156 14% | ||
| 148 13% | ||
| 128 11% | ||
| 123 11% | ||
| 101 9% | ||
| 99 9% | ||
| 94 8% | ||
| 55 5% | ||
| 48 4% | ||
| 48 4% | ||
| 25 2% | ||
| 15 1% | ||
| 15 1% | ||
| 14 1% | ||
| 7 <1% | ||
| 7 <1% | ||
| 6 <1% |
| 208 18% | ||
| 190 17% | ||
| 167 15% | ||
| 98 9% | ||
| 63 6% | ||
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| 50 4% | ||
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| 11 <1% | ||
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| 3 <1% |
| 178 16% | ||
| 166 15% | ||
| 124 11% | ||
| 119 10% | ||
| 92 8% | ||
| 88 8% | ||
| 77 7% | ||
| 75 7% | ||
| 60 5% | ||
| 57 5% | ||
| 44 4% | ||
| 36 3% | ||
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| 28 2% | ||
| 28 2% | ||
| 23 2% | ||
| 19 2% | ||
| 15 1% | ||
| 13 1% | ||
| 12 1% | ||
| 9 <1% | ||
| 4 <1% | ||
| 2 <1% | ||
| 1 <1% |
| 2 | 1 | 1 | 1 | 2 | 1 | 2 | 2 | 4 | 4 | 7 | 2 | 11 | 17 | 48 | 167 | 346 | 127 | 172 | 38 |
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| 86 | 56 | 68 | 70 | 72 | 96 | 81 | 114 | 97 | 62 | 78 | 75 |
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| SUMMER | 290 | |
| FALL | 236 | |
| WINTER | 217 | |
| SPRING | 204 |
| United States | 329 | |
| Canada | 103 | |
| Russia | 34 | |
| Norway | 20 | |
| Iceland | 17 | |
| Finland | 8 | |
| Greenland | 8 | |
| Svalbard and Jan Mayen | 8 | |
| Sweden | 6 | |
| United Kingdom | 6 | |
| Australia | 3 | |
| Japan | 3 | |
| Mexico | 3 | |
| Mongolia | 3 | |
| China | 2 | |
| Czech Republic | 2 | |
| Denmark | 2 | |
| Greece | 2 | |
| Nigeria | 2 | |
| Ukraine | 2 | |
| Afghanistan | 1 | |
| Antarctica | 1 | |
| Cape Verde | 1 | |
| Cocos Islands | 1 | |
| Ecuador | 1 | |
| Estonia | 1 | |
| France | 1 | |
| Guatemala | 1 | |
| Honduras | 1 | |
| India | 1 | |
| Nepal | 1 | |
| Pakistan | 1 | |
| Puerto Rico | 1 | |
| Romania | 1 | |
| Saint Vincent and the Grenadines | 1 | |
| Solomon Islands | 1 | |
| Spain | 1 | |
| Switzerland | 1 | |
| Vietnam | 1 |
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