Search our collection of background (non-event) articles from news media, science journals and other sources.
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| 62 50% | ||
| 35 28% | ||
| 32 26% | ||
| 28 23% | ||
| 12 10% | ||
| 10 8% | ||
| 10 8% | ||
| 9 7% | ||
| 9 7% | ||
| 6 5% | ||
| 5 4% | ||
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| 4 3% | ||
| 4 3% | ||
| 4 3% | ||
| 3 2% | ||
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| 31 25% | ||
| 29 23% | ||
| 24 19% | ||
| 20 16% | ||
| 19 15% | ||
| 16 13% | ||
| 14 11% | ||
| 13 10% | ||
| 12 10% | ||
| 6 5% | ||
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| 4 3% | ||
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| 1 <1% | ||
| 1 <1% | ||
| 1 <1% | ||
| 1 <1% |
| 124 100% | ||
| 46 37% | ||
| 35 28% | ||
| 33 27% | ||
| 27 22% | ||
| 18 15% | ||
| 17 14% | ||
| 17 14% | ||
| 14 11% | ||
| 12 10% | ||
| 12 10% | ||
| 11 9% | ||
| 11 9% | ||
| 6 5% | ||
| 4 3% | ||
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| 3 2% | ||
| 2 2% | ||
| 2 2% | ||
| 2 2% | ||
| 1 <1% |
| 1 | 1 | 2 | 6 | 11 | 45 | 17 | 21 | 3 |
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| 12 | 6 | 7 | 7 | 7 | 12 | 6 | 16 | 13 | 4 | 8 | 9 |
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| SUMMER | 34 | |
| WINTER | 27 | |
| FALL | 24 | |
| SPRING | 21 |
| United States | 54 | |
| Canada | 11 | |
| Russia | 6 | |
| Norway | 3 | |
| Svalbard and Jan Mayen | 3 | |
| Greenland | 2 | |
| Iceland | 2 | |
| Ecuador | 1 | |
| Mexico | 1 | |
| Nigeria | 1 | |
| Saint Vincent and the Grenadines | 1 | |
| Solomon Islands | 1 |
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