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Novel materials: Sound waves traveling backward

Acoustic waves in gases, liquids, and solids usually travel at an almost constant speed of sound. So-called rotons are an exception: their speed of sound changes significantly with the wavelength, and it is also possible ...

Transformation toughening of ceramics made crystal clear

Ceramic materials that are resistant to cracking are used in a variety of industries from aerospace engineering to dentistry. Toughening them to improve their efficiency and safety is therefore an important area of investigation. ...

A quantum step to a heat switch with no moving parts

Researchers have discovered a new electronic property at the frontier between the thermal and quantum sciences in a specially engineered metal alloy—and in the process identified a promising material for future devices ...

Magnetism drives metals to insulators in new experiment

Like all metals, silver, copper, and gold are conductors. Electrons flow across them, carrying heat and electricity. While gold is a good conductor under any conditions, some materials have the property of behaving like metal ...

Water droplets become hydrobots by adding magnetic beads

Using a piece of magnet, researchers have designed a simple system that can control the movement of a small puddle of water, even when it's upside down. The new liquid manipulation strategy, described in the journal Cell ...

A better look at how particles move

If you take a bucket of water balloons and jostle one of them, the neighboring balloons will respond as well. This is a scaled-up example of how collections of cells and other deformable particle packings respond to forces. ...

Physicists uncover secrets of world's thinnest superconductor

Physicists from across three continents report the first experimental evidence to explain the unusual electronic behavior behind the world's thinnest superconductor, a material with myriad applications because it conducts ...

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Over half of the world's rivers cease to flow for at least one day a year on average
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Severe perkinsea infection found in captive UK frogs
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Researchers reveal the inner workings of a viral DNA-packaging motor
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Space scientists solve a decades-long gamma-ray burst puzzle
Bio & Medicine
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