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Thursday, May 28, 2020
Physicists identify unique signature to confirm quark-gluon plasma in Universe

Physicists identify unique signature to confirm quark-gluon plasma in Universe

Computer simulation of a merger between two dense neutron stars. After the merger, a phase transition from ordinary hadronic matter (red-yellow) to quark matter (green) takes place. In the first fractions of a second of our Universe's existence, the energy density was so incredibly high that there were no protons and neutrons, just a hot…
Physicists identify unique signature to confirm quark-gluon plasma in universe

Physicists identify unique signature to confirm quark-gluon plasma in universe

Computer simulation of a merger between two dense neutron stars. After the merger, a phase transition from ordinary hadronic matter (red-yellow) to quark matter (green) takes place. In the first fractions of a second of our universe's existence, the energy density was so incredibly high that there were no protons and neutrons, just a hot…
50 years ago, superconductors started feeling the pressure

50 years ago, superconductors started feeling the pressure

Superconductivity under pressure, Science News, May 2, 1970 – Cooling certain metals to temperatures near absolute zero turns them into superconductors, substances without electrical resistance, in which currents flow without power loss. In recent years it has become apparent that in some cases pressure as well as cooling has something to do with inducing superconductivity. Metals are…
A newfound superconducting current travels only along a material’s edge

A newfound superconducting current travels only along a material’s edge

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Superconductors are getting edgy. For the first time, scientists have spotted a superconducting current traveling along the edge of a material, like a trail of ants crawling along the rim of a dinner plate without venturing into its middle. Normally, such superconducting currents, in which electricity flows without any loss of energy, permeate an entire…
Scientists ‘strummed’ a molecule’s chemical bonds like guitar strings

Scientists ‘strummed’ a molecule’s chemical bonds like guitar strings

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Like plucking a tiny guitar string, scientists have “strummed” chemical bonds. Plucking the bonds, which connect two carbon atoms separated by just 140 billionths of a millimeter, required a minuscule “pick.” A single molecule of carbon monoxide attached to the extremely thin tip of an atomic force microscope did the trick, researchers report in a…
Here’s why “baking” damaged reel-to-reel tapes renders them playable again

Here’s why “baking” damaged reel-to-reel tapes renders them playable again

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Enlarge / Audio buffs are rediscovering the sound quality of reel-to-reel tapes. Chemists at the Library of Congress are studying why the tapes tend to degrade over time and why baking them can often reverse the damage. Reel-to-reel tapes are experiencing a resurgence of interest among audio buffs, but they are prone to degradation, which…
Gravitational waves have revealed the first unevenly sized black hole pair

Gravitational waves have revealed the first unevenly sized black hole pair

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As far as odd couples go, this is one for the record books. The ripples in spacetime stirred up by two distant, merging black holes suggest that one of the pair was much bigger than the other. It’s the first definitively mismatched black hole pair spotted by the LIGO and Virgo collaborations, which search for…
Einstein wins again: Star orbits black hole just like GR predicts

Einstein wins again: Star orbits black hole just like GR predicts

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It's been nearly 30 years in the making, but scientists with the Very Large Telescope (VLT) collaboration in the Atacama Desert in Chile have now measured, for the very first time, the unique orbit of a star orbiting the supermassive black hole believed to lie at the center of our Milky Way galaxy. The path…
A star orbiting the Milky Way’s giant black hole confirms Einstein was right

A star orbiting the Milky Way’s giant black hole confirms Einstein...

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The first sign that Albert Einstein’s theory of gravity was correct has made a repeat appearance, this time near a supermassive black hole. In 1915, Einstein realized that his newly formulated general theory of relativity explained a weird quirk in the orbit of Mercury. Now, that same effect has been found in a star’s orbit…
Stephen Wolfram’s hypergraph project aims for a fundamental theory of physics

Stephen Wolfram’s hypergraph project aims for a fundamental theory of physics

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Thanks to Kevin Bacon, everybody nowadays knows about networks. There are not only Bacon-like networks of actors, linked by appearing in the same film, but also social networks, neural networks and networks of viral transmission. There are power grid networks, ecological networks and the grandest network of all, the internet. Sometimes it seems like the…

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