Porosity of the moon's crust reveals bombardment history

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 ...

Scientists squeeze more out of metal-organic framework

(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.

Researchers explore how impacts 'break in' a new planet

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 ...

When a porous solid retains its properties in liquid form

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 ...

A beautiful wing design solution inspired by owl feathers

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.

Moon's crust as fractured as can be

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 ...

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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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