Science & TechnologyS


Galaxy

A giant star ate its dead neighbor and caused one of the brightest supernovas ever

supernova
© : Science Photo Library - MEHAU KULYK via Getty Images)A bright supernova flares across the sky in this illustration. In 2006, researchers detected one of the brightest supernova explosions ever — and they may finally be able to explain it.
In 2006 a star exploded 50 billion times brighter than our sun. New research suggests it wasn't one star, but two.

In September 2006, an exploding star 50 billion times brighter than Earth's sun blazed to life 240 million light-years away in the Perseus constellation. For 70 days, the blast grew brighter and brighter, outshining its home galaxy by tenfold and measuring hundreds of times more powerful than a typical supernova. At the time, this superbright supernova (also known as a "hypernova") was the brightest stellar explosion ever detected.

What was so special about this record-setting blast (officially labeled SN 2006gy)? Nobody knew. But now, more than a decade later, scientists may finally have a clue. In a new study published today (Jan. 23) in the journal Science, astronomers re-analyzed the mysterious emission lines radiating from the explosion about a year after it peaked.

The team discovered large amounts of iron in the emissions, which they say could only be the result of the supernova interacting with some preexisting layer of stellar material ejected hundreds of years earlier.

Hearts

Oak trees protect citrus crops from deadliest disease, scientific study reveals

Huanglongbing
© USDASymptoms of Huanglongbing include asymmetrical, blotchy yellowing or mottliCredit: ng on leaves with patches of green on one side and yellow on the other.
Image
Wise old oak trees may hold an extract that citrus growers can use to protect their fruit trees from the deadliest citrus crop disease the world has known.

The plant disease is called huanglongbing, or HLB, also known by its English name, citrus greening. The disease shows its presence when leaves turn lighter shades of green.

According to University of Florida Institute of Food and Agricultural Science's (UF/IFAS) officials, HLB is responsible for a 90 percent reduction in the production of Florida's most valuable crop.

"Research scientists work with a sense of urgency to contain the pathogen and to manage HLB's impact on our important crop," said Lorenzo Rossi, assistant professor of plant root biology at the UF/IFAS Indian River Research and Education Center (IRREC), located in Fort Pierce, at the center of the Indian River District. The district is known for its peerless grapefruit quality, where it borders the state's central east coast, from its northernmost point in Micco, Florida, to its southernmost point in northern Palm Beach County.

Comment: As one comment under the article wondered, perhaps mulching with oak leaves could have a similar effect? What this study reflects is that few plants thrive in monocultures or the sterile and restrictive environments most frequently used throughout agricultural production these days, and, were we to understand the synergies in nature, farmers could significantly increase production while reducing the need for chemicals.

In our time where plant diseases are rampant, productivity is struggling, and the food supply is becoming increasingly toxic because of ill informed farming methods, learning how to work with nature has never been so critical for our own survival:


Cassiopaea

Light from Betelgeuse faintest ever recorded, temperature way down in just 4 months, yet star has 'swollen' by 9%

Betelgeuse
© ESOThis picture of the dramatic nebula around the bright red supergiant star Betelgeuse was created from images taken with the VISIR infrared camera on ESO’s Very Large Telescope (VLT). This structure, resembling flames emanating from the star, forms because the behemoth is shedding its material into space. The small red circle in the middle has a diameter about four and half times that of the Earth’s orbit and represents the location of Betelgeuse’s visible surface. The black disc corresponds to a very bright part of the image that was masked to allow the fainter nebula to be seen.
Betelgeuse keeps getting dimmer, and everyone is wondering what exactly that means. The star will go supernova at the end of its life, but that's not projected to happen for tens of thousands of years or so. So what's causing the dimming?

Villanova University astronomers Edward Guinan and Richard Wasatonic were the first to report Betelgeuse's recent dimming. In a new post on The Astronomer's Telegram, the pair of astronomers report a further dimming of Betelgeuse. They also point out that although the star is still dimming, its rate of dimming is slowing.

Betelgeuse is a red supergiant star in the constellation Orion. It left the main sequence about 1 million years ago, and has been a red supergiant for about 40,000 years. It's a core-collapse SN II progenitor, which means that eventually, Betelgeuse will burn enough of its hydrogen that its core will collapse and it will explode as a supernova.

Comment: A great variety of activity occurring in space has been in the news recently: Also check out SOTT radio's:


Arrow Down

David Klinghoffer: Evolutionary thinking in a "state of decadence"

evolution decline
David Klinghoffer quotes from a post by paleontologist Gunter Bechly on everyone's favorite cuddly pet, prehistoric scorpions:
In today's science world it is no longer sufficient to objectively describe some nicely preserved ancient fossils. You must overinterpret the evidence and oversell their importance with a fancy evolutionary narrative. And you do not have to hesitate to be really bold with your claims, because neither the scientific reviewers nor the popular science media will care if your claims are actually supported by the evidence. This system is broken. It was broken by the pressure to publish or perish, by the pressure of public relation departments to generate lurid headlines, and by the pressure of the idiotic paradigm that nothing makes sense in biology except in the light of evolution.

David Klinghoffer, "Scientific Decadence and the Myth of Objectivity" at Evolution News and Science Today

Moon

China releases huge batch of amazing Chang'e-4 images from moon's far side

Chang'e-4
© CNSAAn image taken by China's Chang'e-4 mission on the moon.
China's long-lived lunar robots Chang'e-4 and Yutu-2 are once again at work on the far side of the moon, where they woke up for their 14th day on Jan. 18 and 19 respectively.

And those of us here on Earth can take a new look through the lander's and rover's lunar eyes, as China released a huge batch of data on Monday (Jan. 20). The data release includes high-resolution images of the moon from the Chang'e-4 lander's terrain camera and the panoramic camera on the Yutu-2 rover.

Chang'e-4 just reached the first anniversary of its historic landing in Von Kármán Crater, within the gigantic South Pole-Aitken basin. The newly published photos cover nearly a year of pioneering exploration on the far side of the moon, where no previous mission has landed.

Comment: See also:


Brain

Scientists discovered a rat that had basically no brain but functioned normally

professor
© Ruby Wallau/Northeastern UniversityPsychology professor Craig Ferris, Praveen Kulkarni, and their team oversaw the discovery of a rat that could see, hear, smell, and feel just like its peers, even though it was walking around with basically no brain.
One day, a scientist in Craig Ferris's lab was scanning the brains of very old rats when he found that one could see, hear, smell, and feel just like the other rats, but it was walking around with basically no brain — and likely had been since birth.

This rat, named R222, did have a brain. But its brain, affected by a condition called hydrocephalus, had compressed and collapsed as it filled with fluid, and many of the functions that would ordinarily be carried out in the brain had relocalized to areas that weren't taken over by fluid.

This provided the tools for Ferris, a psychology professor at Northeastern, to investigate how powerful the brain remains, even when tight on space. This, he says, might even influence the ever-present goal of machine learning: How small can you be and still get the job done?

Comment: As detailed in the article Man living with 90% of his brain missing similar discoveries have been made in humans:
"He was living a normal life. He has a family. He works. His IQ was tested at the time of his complaint. This came out to be 84, which is slightly below the normal range ... So, this person is not bright — but perfectly, socially apt".
See also: Also check out SOTT radio's:


Beaker

Russian scientists create artificial 'human skin' that becomes stronger when stretched

Belly
© Global Look PressThe skin solves the problem of being both soft and firm
A Russian-led team of scientists has created a synthetic stand-in for human skin that overcomes many of the stumbling blocks faced in recreating living tissues by being both soft and firm and getting stronger when stretched.

The researchers from Moscow State University, along with colleagues in the United States, spent years developing the clever material, which is even capable of self-assembly.

The skin, which consists of molecular fibers which are grafted onto the long part of the molecule, is very elastic but if it is stretched, twisted or bent out of shape in other ways it gets stronger very quickly.

Galaxy

New high-energy gamma-ray sources found in the galaxy

The High-Altitude Water Cherenkov Gamma-Ray Observatory
The High-Altitude Water Cherenkov Gamma-Ray Observatory spots traces of high-energy gamma rays from space with a series of giant water tanks in Parque Nacional Pico de Orizaba, a Mexican national park.
Researchers have discovered nine new sources of high-energy photons in the Milky Way, including some of the most energetic gamma rays ever detected. By studying these gamma-ray sources, which all seem to originate near spinning neutron stars called pulsars, physicists are working to understand the origins of enigmatic and energetic particles called cosmic rays.

The researchers presented the findings in a paper published Jan. 15 in the journal Physical Review Letters.


Comment: Data from Chinese satellite shedding light on cosmic rays


Microscope 1

The microbes in your gut are a better predictor for disease than genetics

Enterobacteria
© KTSDESIGN/Science SourceEnterobacteria are one of many types of microbes that live in the human gut.
The microbes in our guts have been linked to everything from arthritis to autism. Now, scientists say they can even tell us about our future health. Two new studies find that our "microbiome" — the mix of microbes in our gut — can reveal the presence of many diseases better than our own genes can — and can even anticipate our risk of dying within the next 15 years.

"I am hopeful and enthusiastic that the community will reach a point where we're able to develop microbiome-based therapeutics and diagnostics," says Samuel Minot, a microbiome researcher at Fred Hutchinson Cancer Research Center who was not involved in the research. "I think that this is within the realm of possibility."

In the first study, researchers reviewed 47 studies looking at associations between the collective genomes of the gut microbes and 13 common diseases. These included schizophrenia, hypertension, and asthma — all of which are considered "complex" because they are caused by both environmental and genetic factors. They then compared these studies with 24 genome-wide association (GWA) studies, which correlate specific human genetic variants with diseases.

Comment: See also:


Nebula

Earth's early magnetic field came earlier, stronger and was powered differently than previously believed

magnetic field
© Illustration courtesy of Michael Osadciw (University of Rochester, Rochester, NY) and and John A. Tarduno.Artist rendition of early Earth and Mars 4.2 billion years ago with internally generated magnetic fields. The long life of the geodynamo and magnetic shielding prevented loss of the ocean on Earth, whereas the collapse of the Martian magnetic field contributed to its loss of water.
In order to determine the past magnetic field direction and intensity, the researchers dated and analyzed zircon crystals collected from sites in Australia. The zircons are about two-tenths of a millimeter and contain even smaller magnetic particles that lock in the magnetization of the earth at the time the zircons were formed. Here, a zircon crystal is placed within the "O" on a dime, for scale. Credit: University of Rochester / John Tarduno

Deep within Earth, swirling liquid iron generates our planet's protective magnetic field. This magnetic field is invisible but is vital for life on Earth's surface: it shields the planet from harmful solar wind and cosmic rays from the sun.

Given the importance of the magnetic field, scientists have been trying to figure out how the field has changed throughout Earth's history. That knowledge can provide clues to understanding the future evolution of Earth, as well as the evolution of other planets in the solar system.

New research from the University of Rochester provides evidence that the magnetic field that first formed around Earth was even stronger than scientists previously believed. The research, published in the journal PNAS, will help scientists draw conclusions about the sustainability of Earth's magnetic shield and whether or not there are other planets in the solar system with the conditions necessary to harbor life.

Comment: For more on what happened to Mars, check out Pierre Lescaudron's fascinating article: Did Earth 'Steal' Martian Water?

See also: And check out SOTT radio's: