Around 4.4 billion years ago, the early solar system resembled a game of space rock dodgeball, as massive asteroids and comets, and, later, smaller rocks and galactic debris pummeled the moon and other infant terrestrial ...
Planetary Sciences
Jul 7, 2022
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902
Salt water within the icy shell of Jupiter's moon Europa could be transporting oxygen into an ice-covered ocean of liquid water where it could potentially help sustain alien life, according to a team of researchers led by ...
Astrobiology
Mar 24, 2022
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1120
(PhysOrg.com) -- Scientists at the U.S. Department of Energy's Argonne National Laboratory have discovered a new route to transform the structure of porous materials at industrially-accessible high pressures.
Condensed Matter
Jan 12, 2010
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0
The harder you hit something—a ball, a walnut, a geode—the more likely it is to break open. Or, if it does not break open, it's more likely to at least lose a little bit of its structural integrity, the way new baseball ...
Planetary Sciences
Aug 17, 2022
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200
A University of Wyoming researcher and his team discovered that weathering of subsurface rock in the Southern Sierra Nevada Mountains of California occurs due more to rocks expanding than from chemical decomposition, as previously ...
Earth Sciences
Sep 18, 2019
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28
Known for their exceptional porosity that enables the trapping or transport of molecules, metal-organic frameworks (MOFs) take the form of a powder, which makes them difficult to format. For the first time, an international ...
Materials Science
Oct 10, 2017
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114
Many species of owl are able to hunt without being heard by their prey by suppressing the noise of their wings at sound frequencies above 1.6 kilohertz (kHz)—including the range at which human hearing is most sensitive.
Mathematics
Sep 27, 2017
0
136
Extinct archosaurs' eggshell porosity may be used as a proxy for predicting covered or exposed nest types, according to a study published November 25, 2015 in the open-access journal PLOS ONE by Kohei Tanaka from the University ...
Archaeology
Nov 25, 2015
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8
Scientists believe that about 4 billion years ago, during a period called the Late Heavy Bombardment, the moon took a severe beating, as an army of asteroids pelted its surface, carving out craters and opening deep fissures ...
Space Exploration
Sep 10, 2015
0
68
A researcher from North Carolina State University has developed a technique for creating high-density ceramic materials that requires far lower temperatures than current techniques – and takes less than a second, as opposed ...
Materials Science
Feb 27, 2013
1
2
Porosity or void fraction is a measure of the void (i.e., "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including pharmaceutics, ceramics, metallurgy, materials, manufacturing, earth sciences and construction.
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