Scientific Curiosities

General science/tech/society news, everything not directly related to computer hardware/software.

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Re: Scientific Curiosities

Post by impar » Mon Jul 01, 2019 10:25 am

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A deadly, drug-resistant fungus has swept the globe—here’s how it spreads
With a 30-60% fatality rate, researchers are trying to stem its mysterious spread.

https://arstechnica.com/science/2019/06 ... to-others/
Docs Show Navy Got 'UFO' Patent Granted By Warning Of Similar Chinese Tech Advances
Patent documents indicate that the U.S. and China are actively developing radical new craft that seem eerily similar to UFOs reported by Navy pilots.
...
The hybrid aerospace-underwater craft in Pais’ patent, meanwhile, is described as being capable of incredible feats of speed and maneuverability and can fly equally well in air, water, or space without leaving a heat signature. This is possible, Pais claims in the patent, because the craft is able to “engineer the fabric of our reality at the most fundamental level” by exploiting the laws of physics.
...
https://www.thedrive.com/the-war-zone/2 ... h-advances
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Re: Scientific Curiosities

Post by impar » Tue Jul 09, 2019 10:12 am

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HIV eliminated from the genomes of living animals

In a major collaborative effort, researchers at the Lewis Katz School of Medicine at Temple University and the University of Nebraska Medical Center (UNMC) have for the first time eliminated replication-competent HIV-1 DNA—the virus responsible for AIDS—from the genomes of living animals. The study, reported online July 2 in the journal Nature Communications, marks a critical step toward the development of a possible cure for human HIV infection.

https://medicalxpress.com/news/2019-07- ... imals.html
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Re: Scientific Curiosities

Post by impar » Mon Jul 15, 2019 11:34 am

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Alternative theory of gravity makes a nearly testable prediction
A massive simulation done with a "chameleon" theory of gravity.
...
General relativity explains a broad range of phenomena, and it works well to describe the Universe as a whole, provided dark matter and dark energy exist as separate entities. Any alternatives to gravity have to account for everything that's explained by general relativity while also accounting for the additional effects of at least one of these two dark forces. A class of theories, collectively termed MOND (for Modified Newtonian Dynamics), is intended to do away with dark matter, but it struggles to account for things relativity handles with easy.

And, when it comes to dark energy, MOND is silent, in part because it was originally developed before dark energy was known to be an issue. Instead, an entirely separate class of theories has been developed that handle gravity while eliminating the need for a separate dark energy. These are known as f(R) models and are commonly described as having a "chameleon" mechanism. That's because they posit an additional force that changes its behavior based on its surroundings.

Where there's a lot of matter, the chameleon force is minimized, allowing it to blend in with its surroundings. As matter becomes sparse on larger scales, it starts to make its presence felt. That's why we can't detect any major deviations from relativity on Earth or near objects like neutron stars, but we do detect them when we start looking at the large scale structure of the Universe. The net result is an acceleration of the expansion of the Universe that's only apparent at large scales—just like dark energy.
...
https://arstechnica.com/science/2019/07 ... rediction/
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Re: Scientific Curiosities

Post by impar » Thu Jul 18, 2019 9:38 am

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New archaeological layer discovered at L’Anse aux Meadows
The story of the only undisputed Norse site in the Americas just got more complicated.

https://arstechnica.com/science/2019/07 ... h-america/
Zombifying fungus bypasses the brain to make ants its puppets, study finds
SEM images showed strange bead-like particles that could also play a role.

https://arstechnica.com/science/2019/07 ... the-brain/
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Re: Scientific Curiosities

Post by impar » Mon Jul 22, 2019 11:19 am

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Watch this paper doll do sit-ups thanks to new kind of “artificial muscle”
Flexible material contracts in response to ethanol vapor, relaxes when vapor is gone.

https://arstechnica.com/science/2019/07 ... al-muscle/
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Re: Scientific Curiosities

Post by impar » Tue Jul 30, 2019 9:25 am

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Undead Tree Stump Is Being Kept Alive by Neighboring Trees

A tree stump in New Zealand is very much alive, thanks to an interconnected root system that benefits both the stump and its neighboring trees. Scientists say this unusual symbiotic arrangement could change our very conception of what it means to be a tree.

https://gizmodo.com/undead-tree-stump-i ... 1836693364
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Re: Scientific Curiosities

Post by impar » Thu Aug 08, 2019 11:18 am

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Is that rare whisky bottle the real deal? This artificial tongue can make the call
Counterfeits of rare single-malt whisky are a growing problem for the industry.

https://arstechnica.com/science/2019/08 ... -the-call/
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Re: Scientific Curiosities

Post by impar » Mon Aug 12, 2019 11:28 am

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The last magnetic pole flip saw 22,000 years of weirdness
When the Earth's magnetic poles trade places, they take a while to get sorted.

https://arstechnica.com/science/2019/08 ... weirdness/
We now know what causes these two shark species to glow green
A previously unknown family of metabolites may also have antimicrobial properties.

https://arstechnica.com/science/2019/08 ... low-green/
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Re: Scientific Curiosities

Post by impar » Tue Aug 13, 2019 11:28 am

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Two Ebola drugs boost survival rates, according to early trial data
The two experimental treatments will continue on in more trials.

https://arstechnica.com/science/2019/08 ... rial-data/
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Re: Scientific Curiosities

Post by impar » Mon Aug 19, 2019 11:05 am

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How a new antibiotic destroys extremely drug-resistant tuberculosis
The new drug manages to poison even stealth, non-replicating bacteria.

https://arstechnica.com/science/2019/08 ... erculosis/
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