Biology could explain the find, but there are other potential explanations.
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Chemical accidents rise as Trump administration proposes weakening safety rules
Chemicals from accidents that injured or killed people increased by nearly 50 percent in recent years.
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The missing 500 million: Cosmic bombardment melted Earth's first crust
The heat of the Hadean may have come from impacts as well as the interior.
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NRC is (sort of) getting rid of "as low as reasonably achievable" standard
Its issues with current nuclear safety standards are termed semantic, not physical.
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Katalyst's satellite rescue mission is now in pursuit of NASA's Swift
It will take several weeks for the Link spacecraft to rendezvous with NASA's Swift observatory.
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