Science, General Stuff

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RTH10260
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Re: Science, General Stuff

#1326

Post by RTH10260 »

This is the only known animal that doesn’t need oxygen to survive
By Rodrigo Pérez Ortega Feb. 26, 2020 , 5:05 PM

Breathing is essential for animals to stay alive. Or so we thought. In a study published Monday in the Proceedings of the National Academy of Sciences, researchers have now identified the first animal that doesn’t use oxygen to breathe: Henneguya salminicola, an 8-millimeter white parasite that infects the flesh of Chinook salmon. Multicellular organisms use oxygen to produce energy, a process that happens in the mitochondria. This organelle has its own genes for this process, but when scientists looked for them in the parasite, they were completely absent, New Scientist reports. The reason why this animal­­ lost the genes to breathe is unclear, but it’s possible it gets its energy from its host.


https://www.sciencemag.org/news/2020/02 ... en-survive

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tencats
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Re: Science, General Stuff

#1327

Post by tencats »

DNA testing reveals Chattanooga Zoo’s Komodo dragon produced offspring on her own
https://www.kiro7.com/news/trending/dna ... QFQLHCRO4/
The three hatchlings were born at the zoo to Charlie on Aug. 4, 2019, the newspaper reported. DNA testing showed the first-time mother had not produced the eggs with the help of male dragon Kadal. Instead, Charlie reproduced through parthenogenesis, the newspaper reported.

Parthenogenesis is a process where a female can produce offspring without male fertilization, the News Free Press reported.

Charlie and Kadal were paired together, but as it turned out, Charlie did not need any help.

“Although Kadal and Charlie were placed together in the hopes of breeding, the Chattanooga Zoo staff is very excited to witness this monumental work of nature and be part of such an important conservation program,” zoo officials said in a news release.

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Notorial Dissent
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Re: Science, General Stuff

#1328

Post by Notorial Dissent »

Didn't know they could do that. Cussed creatures. Really neat, fun to watch.
The fact that you sincerely and wholeheartedly believe that the “Law of Gravity” is unconstitutional and a violation of your sovereign rights, does not absolve you of adherence to it.

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Re: Science, General Stuff

#1329

Post by AndyinPA »

Cool!
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Danraft
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Re: Science, General Stuff

#1330

Post by Danraft »

I’ve done some interesting reading on whales because of my interest in diagnosing chronic diseases using metabolic markers. Turns out the best source of bio markers is in earwax (because many markers are lipid soluble and/or produced by the cholesterol pathways that change dramatically with metabolic regulation (HMG-CoA pathways)).

Stress hormones are easily studied in cerumen and whales are unusual because their earwax builds up in hard layered ear plugs that show sequential changes in cortisol levels. These ear plugs have been saved in museums and have been used to create a theoretical timeline of whale stress using cortisol levels in earplugs as a proxy.
https://www.nhm.ac.uk/discover/news/201 ... s-out.html


RTH10260 wrote:
Fri Mar 06, 2020 3:28 am
Solar storms can hamper whales' navigation, cause them to strand: Study
Radio frequency noise created by solar outburst affects whales’ senses and prevents them from navigating, according to the research

By DTE Staff
Last Updated: Tuesday 25 February 2020

Sudden releases of high-energy particles from the sun, called solar storms, can mess with the navigational ability of California gray whales, causing them to strand on land. The finding was recently published in science journal Current Biology.

Solar storms have the potential to modify geomagnetic field and disrupt magnetic orientation behaviour of animals, hampering their navigation during long periods of migration.

According to Duke University’s Jesse Granger, who authored the research paper, solar storms disrupt earth’s magnetic field — and the whales’ navigational sense.

However, it might not be the solar storm warping the Earth’s magnetic field that causes whales to lose way, according to Granger. The radio frequency noise created by the solar outburst affects the whales’ senses in a way that prevents them from navigating at all.

While correlation between solar activity and migratory behavior has been established before, Granger’s research tries to dig deeper.

According to the study, gray whales were chosen to test the relationship because they migrate 10,000 miles a year, from Baja California to Alaska and back.

Her team compiled datasets from United States' National Oceanic and Atmospheric Administration (NOAA), and studied cases of over 31 years where gray whales were stranded. Data on whales which were sick, injured or malnourished was omitted. A total of 186 such cases of healthy strandings were found.

On studying the impact of solar activity on stranding, Granger concluded that gray whales were 4.3 times more likely to strand when a lot of radio frequency noise from a solar outburst was hitting the Earth.


https://www.downtoearth.org.in/news/sci ... tudy-69446
The Mercury Project

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RVInit
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Re: Science, General Stuff

#1331

Post by RVInit »

One of my favorite Twitter feeds. I get on their website and follow a number of sharks. There is high quality science being done in spite of everything else.

"I know that human being and fish can coexist peacefully"
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RTH10260
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Re: Science, General Stuff

#1332

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Re: Science, General Stuff

#1333

Post by Volkonski »

Physics takes a hit.
CERN
@CERN
#Covid_19
CERN has taken several strict measures to protect the health of all of CERN’s personnel, visitors, and contractors. These measures include the cancellation of all public guided tours, public events, as well as closing our exhibitions until further notice. 1/3
2:00 PM · Mar 12, 2020·Twitter Web App

CERN has suspended all travels on behalf of CERN, and on-site meetings are limited in scope and size. As of 16 March, access to the CERN sites by our community will be limited. 2/3

The goal is to reduce the density of people on site, by focussing on our essential on-site activities at this stage. CERN is very aware that it may evolve further. For up-to-date information, please see: https://hse.cern/news-article/coronavir ... mendations 3/3
Image“If everyone fought for their own convictions there would be no war.”
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RTH10260
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Re: Science, General Stuff

#1334

Post by RTH10260 »

But the God particle - it ought to protect them :?:

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RTH10260
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Re: Science, General Stuff

#1335

Post by RTH10260 »

Why Measles Deaths Are Surging—and Coronavirus Could Make it Worse
Measles has killed thousands in the Democratic Republic of the Congo, and 23 countries have suspended vaccination campaigns

By Leslie Roberts, Nature magazine on April 8, 2020

A motorcycle driver loads vaccines to be transported in further rural areas in Temba, near Seke Banza, western DR Congo on March 3, 2020. Credit: Junior Kannah Getty Images
A viral outbreak has killed more than 6,500 children in the Democratic Republic of the Congo (DRC) and is still spreading through the country. The foe isn’t the feared coronavirus, which has only just reached the DRC. It’s an old, familiar and underestimated adversary: measles.

Cases began to spike here in October 2018. Children became weak, feverish and congested, with red eyes and painful sores in their mouths, all with the telltale rash of measles. “We have been running after the virus ever since,” says Balcha Masresha, an epidemiologist with the World Health Organization (WHO) regional Africa office in Brazzaville in the neighbouring Republic of Congo. The situation has mushroomed into what WHO experts say might be the largest documented measles outbreak in one country since the world gained a measles vaccine in 1963 (see ‘Measles cases on the rise’).

The highly contagious measles virus continues to spread around the globe. In 2018, cases surged to an estimated 10 million worldwide, with 140,000 deaths, a 58% increase since 2016. In rich countries, scattered measles outbreaks are fuelled by people refusing to vaccinate their children. But in poor countries, the problems are health systems so broken and underfunded that it is nigh-on impossible to deliver the vaccine to people who need it. The DRC’s flood of cases shows why measles will keep flaring up despite efforts to control it. And the situation will only worsen with the COVID-19 pandemic: more than 20 countries have already suspended measles vaccination campaigns as healthcare workers scramble to deal with coronavirus.


https://www.scientificamerican.com/arti ... -it-worse/

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Re: Science, General Stuff

#1336

Post by Tiredretiredlawyer »

This is dedicated to Suranis.

https://phys.org/news/2020-04-mouse-rev ... tions.html
The face of a mouse reveals its emotions: study

Researchers at the Max Planck Institute of Neurobiology are the first to describe emotional facial expressions for mice. Similar to humans, mouse facial expressions change when it tastes something sweet or bitter, or when it becomes anxious. With this new possibility of measuring the emotions of mice, neurobiologists can investigate the basic mechanisms of how emotions are generated and processed in the brain.

When the scientists measured the activity of individual neurons using two-photon microscopy and simultaneously recorded the emotional facial expressions of the mouse, something astonishing came to light: Individual neurons of the insular cortex reacted with the same strength and at the exactly same time as the mouse's facial expression. In addition, each individual neuron was linked to only one single emotion.
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A 19th Amendment Centennial Moment:
The 19th Amendment was first introduced to Congress in 1878, yet it was not approved by Congress until 1919 – 41 years later.
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RTH10260
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Re: Science, General Stuff

#1337

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RTH10260
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Re: Science, General Stuff

#1338

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Mars Needs Money: White House Budget Could Prompt Retreat from Red Planet
Proposed cuts could end decades of U.S. leadership in exploring that world

By Leonard David on April 30, 2020

NASA’s Mars Exploration Program is in calamitous straits. Cuts to the program in President Donald Trump’s budget proposal for the 2021 fiscal year (FY) could pull the plug on the space agency’s ensemble of orbiters, as well as its only active Mars rover, Curiosity, which has been prowling the Red Planet since 2012.

If unchanged, the budget numbers would, in this calendar year, shutter an aged but functional communications relay and science orbiter, Mars Odyssey, which has operated at the planet since 2001. They would also curtail Curiosity just as it reaches new heights in its ongoing science investigations on Mount Sharp in Gale Crater. The funding shortfall would close out the rover’s work late next year, before it can explore a major transition in the ancient climate of Mars that is thought to be recorded in rocks higher on the mountain.

Furthermore, the FY 2021 budget reduces the science sleuthing of NASA’s Mars Reconnaissance Orbiter (MRO) by 20 percent. It cuts the number of targeted observations MRO can execute in half, purging most of the special data products associated with them. Like Mars Odyssey, MRO is a dual-purpose orbiter, serving as a crucial data relay while also providing high-resolution imagery of potential future landing sites.

The diminished budget would also impact the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft, scaling back that mission’s science operations to minimal levels. Orbiting Mars since 2014, MAVEN allows researchers to track the ongoing deterioration of the planet’s atmosphere—a process that, billions of years ago, transformed Mars from a warm, wet world to its current cold, arid state.


https://www.scientificamerican.com/arti ... ed-planet/

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RTH10260
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Re: Science, General Stuff

#1339

Post by RTH10260 »

don't blink or you'll have missed it
The World's Fastest Camera Is Frankly Mind-Boggling
At 70 trillion frames per second, it's fast enough to document nuclear fusion and radioactive molecule decay.

BY COURTNEY LINDER
MAY 12, 2020

Scientists developed a new camera that can take a whopping 70 trillion frames per second.
One of the inventors calls the new process compressed ultrafast spectral photography, or CUSP.
The study appears in the April 29 edition of Nature Communications.


For as much as cameras allow us to experience phenomena that would otherwise go unnoticed, their imaging speeds still fundamentally limit our capability to see, well, everything. Now, scientists at the California Institute of Technology hope to change that.

In a new paper published in the journal Nature Communications, the scientists outline a new imaging technique that can capture a mind-boggling 70 trillion frames per second.

Prior imaging developments based on silicon sensors have ushered in speeds up to millions of frames per second, Lihong Wang, a medical engineering and electrical engineering professor at Caltech, tells Popular Mechanics. But that still isn't nearly fast enough to observe and document some of the most fleeting curiosities in our physical world, from nuclear fusion, to ultrashort pulses of light on the order of picoseconds (10−12 second), to the fluorescent radioactive decay of molecules.

Scientists usually study these ultra-fast occurrences by triggering the desired event multiple times and repeatedly observing it through a different window of time. This nonlinear approach, often used to study chemical reactions, is called the pump-probe method. While clever, it's still impossible to render images of the ultrafast events in real time, which means only repeatable tasks may benefit from it.

Wang's technique, which he calls compressed ultrafast spectral photography (CUSP), uses short pulses of laser light that each last for just one femtosecond, or one quadrillionth of a second. It's easiest to think of the advanced process in two steps: imaging and illumination.


https://www.popularmechanics.com/techno ... st-camera/

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