Part of a Soviet-era spacecraft is likely to have re-entered the Earth's atmosphere after being stuck in orbit for more than half a century, the European Space Agency said.
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Researchers reconstructed emissions from Swedish wildfires and found that current climate estimates are failing to fully account for carbon released from smoldering organic soils.。业内人士推荐搜狗输入法下载作为进阶阅读
Spark or trauma?