科学与环境
Auroral structure could be caused by bouncing electrons
来源: Phys.org - latest science and technology news stories · 发布于
The aurora is among nature's most visually striking phenomena. It occurs when charged particles from the sun are funneled by Earth's magnetic field into the upper atmosphere, where they collide with atoms and molecules and produce distinctly colored curtainlike patterns of light.
The aurora is among nature's most visually striking phenomena. It occurs when charged particles from the sun are funneled by Earth's magnetic field into the upper atmosphere, where they collide with atoms and molecules and produce distinctly colored curtainlike patterns of light.
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Earth's core may have been leaking hydrogen for billions of years
When Earth formed billions of years ago, its metallic core was wrapped in a global ocean of molten rock, which eventually cooled and crystallized to form the mantle. Today, when deep-rooted mantle plumes rise toward the surface and produce volcanic eruptions, the resulting lava c
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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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Mission blasts off for Mars to grab a piece of its moon
A spacecraft is set to launch on an ambitious mission to bring 10g of Martian moon dust back to Earth.
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AI helps reveal what sustainability issues companies emphasize
Every loaf of bread has a carbon footprint, a supply chain and a workforce behind it. As climate change, food safety and labor rights attract growing attention, corporate disclosures on environmental, social and governance (ESG) issues are becoming increasingly important. But wha
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Molecular pendulum shuttles protons to enable rapid hydrogen production in enzymes
Nearly all metabolic processes require protons—positively charged hydrogen atoms. Although these are abundant in the cellular fluid, the biocatalysts involved depend on mechanisms for efficiently capturing protons and transporting them to the site where catalysis occurs. Enzymes
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