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Nov 10, 2022

Scientists Tested Einstein’s Relativity on a Cosmic Scale, And Found Something Odd

Posted by in categories: physics, space

Everything in the Universe has gravity – and feels it too. Yet this most common of all fundamental forces is also the one that presents the biggest challenges to physicists.

Albert Einstein’s theory of general relativity has been remarkably successful in describing the gravity of stars and planets, but it doesn’t seem to apply perfectly on all scales.

General relativity has passed many years of observational tests, from Eddington’s measurement of the deflection of starlight by the Sun in 1919 to the recent detection of gravitational waves.

Nov 10, 2022

Gamma Ray Generation Using High-Powered Lasers

Posted by in category: particle physics

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This article focuses on the concept of gamma rays, their sources and emitters. It then focuses on the presence of gamma rays in the cosmos and how they are generated. Finally, it talks about joint research between facilities in the US and Czech Republic and how they would benefit the gamma-ray generation process.

Image Credit: sakkmesterke/Shutterstock.com

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Nov 10, 2022

Matter–antimatter gigaelectron volt gamma ray laser rocket propulsion

Posted by in categories: particle physics, robotics/AI, space

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It is shown that the idea of a photon rocket through the complete annihilation of matter with antimatter, first proposed by Sänger, is not a utopian scheme as it is widely believed. Its feasibility appears to be possible by the radiative collapse of a relativistic high current pinch discharge in a hydrogen–antihydrogen ambiplasma down to a radius determined by Heisenberg’s uncertainty principle. Through this collapse to ultrahigh densities the proton–antiproton pairs in the center of the pinch can become the upper gigaelectron volt laser level for the transition into a coherent gamma ray beam by proton–antiproton annihilation, with the magnetic field of the collapsed pinch discharge absorbing the recoil momentum of the beam and transmitting it by the Moessbauer effect to the spacecraft. The gamma ray laser beam is launched as a photon avalanche from one end of the pinch discharge channel. Because of the enormous technical problems to produce and store large amounts of anti-matter, such a propulsion concept may find its first realization in small unmanned space probes to explore nearby solar systems. The laboratory demonstration of a gigaelectron volt gamma ray laser by comparison requiring small amounts of anti-matter may be much closer.

Nov 10, 2022

Elon Musk Is Totally Wrong About Population Collapse

Posted by in category: Elon Musk

Tesla’s outspoken CEO thinks the biggest threat facing the planet is people not having enough babies. Demographers disagree.

Nov 10, 2022

Amid ‘biotech winter,’ Insilico turns up the heat with Sanofi deal worth $1.2B in biobucks

Posted by in categories: biotech/medical, robotics/AI

Insilico Medicine is radiating heat amid the biotech winter, kindling its fires with a Sanofi collaboration that could be worth up to $1.2 billion in biobucks—the AI drug discovery company’s larges | Insilico Medicine is radiating heat amid the biotech winter, kindling its fires with a Sanofi collab that could be worth up to $1.2 billion in biobucks—the AI drug discovery company’s largest deal to date.

Nov 10, 2022

Can Machines Control Our Brains?

Posted by in categories: computing, neuroscience

Advances in brain-computer interface technology are impressive, but we’re not close to anything resembling mind control.

Nov 10, 2022

Automated Economies & Unemployment

Posted by in categories: economics, robotics/AI

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Many fear that future automation may turn out to be the bane of civilization rather than its liberator. How do we ensure we take the path to a prosperous world and not one of ruin?

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Continue reading “Automated Economies & Unemployment” »

Nov 10, 2022

Divers Growing Veggies in Underwater Greenhouses

Posted by in categories: food, sustainability

He’s hoping that his plastic orbs, which rest between 15 and 36 feet below the ocean’s surface and hold about 528 gallons of air, will provide a water-conserving, overall sustainable alternative to on-land agricultural operations, particularly helping dry coastal nations grow more food without having to desalinate more water — a costly and resource-intensive process. The plants require just a small bit of starter water, but from there, they’re self-sustaining. Sunlight heats the submerged spheres, which contain humid air that naturally condenses into freshwater on the walls and drips back into the soil.

“Since the underwater farm needs an external source of water only for the start-up of plants growing,” reads the company’s site, “our system could be useful for those locations far from the bodies of water available.”

Nov 10, 2022

First transfusions of lab-grown blood

Posted by in categories: biotech/medical, health

Recently, two patients in the United Kingdom received two small doses of lab-grown blood samples as part of the RESTORE trial.

Image Credit: Sashkin / Shutterstock.com

About the RESTORE trial

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Nov 10, 2022

Targeting Key Cells in Spinal Cord Got Paralyzed Patients Walking Again

Posted by in category: biotech/medical

The findings come, in part, from nine patients involved in an ongoing Swiss study that is seeking to restore movement to people with paralysis.

All nine rapidly regained the ability to stand and walk with the help of implants that electrically stimulate spinal nerves that control lower-body movement.

Now the researchers are reporting that they’ve identified a specific group of cells in the lower spine that appear necessary for that movement recovery to happen.