科学与环境
How lessons from fisheries management could help us govern Earth's orbital space
来源: Phys.org - latest science and technology news stories · 发布于
The space industry is rapidly expanding. About 20,000 satellites already circle Earth, a number that could reach 100,000 by 2030. They bring growing environmental costs: space debris, collision risks, atmospheric pollution from launches and reentry and interference with astronomi
The space industry is rapidly expanding. About 20,000 satellites already circle Earth, a number that could reach 100,000 by 2030. They bring growing environmental costs: space debris, collision risks, atmospheric pollution from launches and reentry and interference with astronomical observations.
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Scientists uncover the 2.3-billion-year-old secret that helped keep Earth habitable
Scientists may have solved a 2.3-billion-year-old mystery about how Earth maintained enough oxygen to support life. Ancient rocks reveal that phosphorus recycling in the oceans created a self-sustaining cycle that helped keep oxygen levels high, even as the planet underwent drama
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Earth's climate system increasingly unstable, but signs of positive change emerge
The seventh annual report by an international coalition led by Oregon State University scientists says the Earth's climate system is quickly becoming unstable and that while signs of important societal changes are emerging, greater and faster action is necessary.
Phys.org - latest science and technology news stories ·
Scientists may have finally solved the mystery of the Moon’s two faces
Scientists may have solved a long-standing mystery about why the Moon’s two sides are so different, using samples collected from its farside for the first time. Their findings suggest that uneven heating from Earth's gravitational pull drove enormous flows of ancient magma, creat
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Europe's new Sentinel-3C satellite just sent back spectacular images of Earth
Europe's Sentinel-3C satellite has returned breathtaking images of Earth just two weeks after launch, revealing the snowy Alps, frozen Arctic islands, and brilliant turquoise Caribbean waters. Its first measurements also show promising results for tracking rising seas, melting ic
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NASA spots a giant patch of Moon-like rock on Earth
An astronaut aboard the International Space Station photographed a remarkable formation in Madagascar that looks surprisingly similar to the Moon’s bright highlands. Made of anorthosite, a rock abundant on the lunar surface, the formation dates back at least 600 million years and
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