Davide Castelvecchi
Davide Castelvecchi
Reporter covering physics, astronomy, math, and technology at NatureNews. Photo of KAGRA's Y tunnel by yours truly.Source
London, England
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Neutrinos Reveal Final Secret of Sun’s Nuclear Fusion

Neutrinos Reveal Final Secret of Sun’s Nuclear Fusion

Physicists have filled in the last missing detail of how nuclear fusion powers the Sun, by catching neutrinos emanating from the star’s core.The detection confirms decades-old theoretical predictions that some of the Sun’s energy is made by a chain of reactions involving carbon and nitrogen nuclei. This process fuses four protons together into a helium nucleus, releasing two neutrinos—the lightest known elementary particles of matter—as well as other subatomic particles and copious amounts of energy. This carbon-nitrogen (CN) reaction is not the Sun’s only fusion pathway—it produces less...

June 29, 2020
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Mathematicians urge colleagues to boycott police work in wake of killings

Mathematicians urge colleagues to boycott police work in wake of killings

The tide of reckoning on systemic racism and police brutality that has been sweeping through institutions — — has reached universities’ normally reclusive mathematics departments. A group of mathematicians in the United States has written a letter calling for their colleagues to stop collaborating with police because of the widely documented disparities in how US law-enforcement agencies treat people of different races and ethnicities. They concentrate their criticism on , a maths-based technique aimed at stopping crime before it occurs.The , dated 15 June, is addressed to the trade journal...

June 19, 2020
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This Black-Hole Collision Just Made Gravitational Waves Even More Interesting

This Black-Hole Collision Just Made Gravitational Waves Even More Interesting

Gravitational-wave astronomers have for the first time detected a collision between two black holes of substantially different masses—opening up a new vista on astrophysics and on the physics of gravity. The event offers the first unmistakable evidence from these faint space-time ripples that at least one black hole was spinning before merging, giving astronomers rare insight into a key property of these these dark objects.“It’s an exceptional event,” said Maya Fishbach, an astrophysicist at the University of Chicago in Illinois. Similar mergers on which data have been published all took...

April 26, 2020
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