Science News

Where did Earth's water come from?

A blue ocean of water

As a part of this month's geochemistry/cosmochemistry, Staff Scientist Conel Alexander explains where Earth's water comes from. 

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New form of silicon could enable next-gen electronic and energy devices

Visualization of the structure of 4H-Si viewed perpendicular to the hexagonal axis. A transmission electron micrograph showing the stacking sequence is displayed in the background.

A team led by Carnegie’s Thomas Shiell and Timothy Strobel developed a new method for synthesizing a novel crystalline form of silicon with a hexagonal structure that could potentially be used to create next-generation electronic and energy devices with enhanced properties that exceed those of the “normal” cubic form of silicon used today.

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Collaboration cracked the case on deep focus quakes

Blue Diamond Inclusion

When it comes to earthquakes, seismologists know best. But deep-focus earthquakes—those that occur between 300 and 700 km below the surface—have been a mystery to science for a century. Over the years, many scientists have suggested different answers to this problem. Still, the deep Earth is impossible to study directly, so the earthquakes kept their secrets until a group of scientists at the Earth and Planets Laboratory teamed up to crack the case. 

 
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May 2021 | Letter from the Directors

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Unlike the cicadas who go pretty much unnoticed during their time underground, EPL staff have been quite visible over the last year as they turn datasets acquired pre-pandemic into publications. As is typical of the work pursued by EPL scientists, the discoveries range from the deep Earth to distant stars.

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What causes the deep Earth’s most mysterious earthquakes?

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The cause of Earth’s deepest earthquakes has been a mystery to science for more than a century, but a team of Carnegie scientists may have cracked the case.

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Earth and Planets Laboratory’s Top Questions in Petrology, Mineralogy, and Mineral Physics

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In this article, our petrologists, mineralogists, and mineral physicists have highlighted six questions that we’re working on so that we can better tell the story of our planet. 

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