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Massive, growing weak spot in Earth's magnetic field about to split in two says NASA

South Atlantic Anomaly
© NASA
Geologists began expressing concerns about the magnetic field that shields Earth from deadly solar radiation in 2019, when the US National Oceanic and Atmospheric Administration was forced to update its World Magnetic Model a year early after finding that the magnetic north pole was rapidly moving out of the Canadian Arctic and toward Siberia.

The US National Aeronautics and Space Administration is tracking an immense, growing, and slowly splitting "dent" in the Earth's Magnetic field.

The area, known as the South Atlantic Anomaly, is situated in the southern hemisphere between South America and the southern Atlantic Ocean off the coast of southwestern Africa. According to recent NASA monitoring and modeling, the area is expanding westward and becoming weaker, and expected to completely split into two separate cells, each spanning thousands of kilometres across, soon.

NASA says the weakening of the magnetic field in this area threatens to allow more solar radiation to get closer to the surface of Earth, disabling electronics or scrambling or temporarily disabling satellites and other space-based man-made objects that pass through it.

Water

Microplastic particles now discoverable in human organs

plastic waste
© Rungroj Yongrit/EPA
Scientists have identified chemical traces of plastic in tissue.
Microplastic and nanoplastic particles are now discoverable in human organs thanks to a new technique.

Microplastics have polluted the entire planet, from Arctic snow and Alpine soils to the deepest oceans. People are also known to consume them via food and water, and to breathe them in, but the potential impact on human health is not yet known.

The researchers expect to find the particles in human organs and have identified chemical traces of plastic in tissue. But isolating and characterising such minuscule fragments is difficult, and contamination from plastics in the air is also a challenge.

To test their technique, they added particles to 47 samples of lung, liver, spleen and kidney tissue obtained from a tissue bank established to study neurodegenerative diseases. Their results showed that the microplastics could be detected in every sample.

The scientists, whose work is being presented at a meeting of the American Chemical Society on Monday, said their technique would enable other researchers to determine contamination levels in human organs around the world.

Meteor

A car-sized asteroid made the closest EVER Earth flyby - NASA 'didn't see it coming'

A diagram of asteroid 2020 QG
© Minor Planet Center/International Astronomical Union
A diagram of asteroid 2020 QG flying past Earth on August 16. The yellow arrow shows the direction of the sun, blue shows Earth's direction, and the green hatches show the asteroid's location every 30 minutes.
A newly discovered car-sized asteroid just made the closest-known flyby to Earth without hitting our planet.

On Sunday (Aug. 16), the asteroid, initially labeled ZTF0DxQ and now formally known to astronomers as 2020 QG, swooped by Earth at a mere 1,830 miles (2,950 kilometers) away. That gives 2020 QG the title of closest asteroid flyby ever recorded that didn't end with the space rock's demise.

It's the closest known, non-impacting asteroid, NASA officials told Space.com.

The flyby wasn't expected and took many by surprise. In fact, the Palomar Observatory didn't detect the zooming asteroid until about six hours after the object's closest approach. "The asteroid approached undetected from the direction of the sun," Paul Chodas, the director of NASA's Center for Near Earth Object Studies, told Business Insider. "We didn't see it coming."


Comment: Meanwhile from earlier this year: Massive explosion leaves giant crater in Akure, Nigeria, dozens of buildings damaged - UPDATE: Expert suspects METEOR IMPACT


Stock Up

NYT asks the obvious: What if 'herd immunity' is closer than scientists thought?

Borough Park neighborhood of Brooklyn
© Brittainy Newman/The New York Times
The Borough Park neighborhood of Brooklyn, July 30, 2020.
We've known from the beginning how the end will arrive. Eventually, the coronavirus will be unable to find enough susceptible hosts to survive, fading out wherever it briefly emerges.

To achieve so-called herd immunity — the point at which the virus can no longer spread because there are not enough vulnerable humans — scientists have suggested that perhaps 70% of a given population must be immune, through vaccination or because they survived the infection.

Now some researchers are wrestling with a hopeful possibility. In interviews with The New York Times, more than a dozen scientists said that the threshold is likely to be much lower: just 50%, perhaps even less. If that's true, then it may be possible to turn back the coronavirus more quickly than once thought.


Comment: Newsflash, it's lower than 50%, and it has already been reached in most places: Lockdown lunacy 3.0: It's over


The new estimates result from complicated statistical modeling of the pandemic, and the models have all taken divergent approaches, yielding inconsistent estimates. It is not certain that any community in the world has enough residents now immune to the virus to resist a second wave.


Comment: They're prepping us for a second wave, which will most likely be mostly fictional in nature.


But in parts of New York, London and Mumbai, India, for example, it is not inconceivable that there is already substantial immunity to the coronavirus, scientists said.

"I'm quite prepared to believe that there are pockets in New York City and London which have substantial immunity," said Bill Hanage, an epidemiologist at the Harvard T.H. Chan School of Public Health. "What happens this winter will reflect that."

Better Earth

'Climate change' cause of woolly rhinoceros extinction 14,000 years ago - study

woolly rhinoceros
© PA Fedor Shidlovsky/Cell Press
A woolly rhinoceros skeleton.
While the arrival of humans has been proposed as a potential cause of extinction, evidence on this is limited.

Historic climate change rather than overhunting may have caused the woolly rhinoceros to become extinct around 14,000 years ago, scientists have said.

The giant herbivorous creatures are thought to have roamed northern Asia and Europe during the ice ages around 350,000 years ago and genetic analysis suggests they were well adapted to living in colder climates.

Comment: Was the woolly rhino really a creature suited to frigid arctic conditions? Pierre Lescaudron questions the 'woolly' mammoth theory in his article Of Flash Frozen Mammoths and Cosmic Catastrophes:
The Woolly Mammoths

The woolly mammoth is a close cousin of the modern elephant. Its size was similar to the African elephant, males reaching shoulder height of about 3 m (10 ft) and weighing up to 6 tonnes.

The mammoths had a plant-based diet and a fully grown male would need to eat about 180 kg (400 lb) of food daily.

[...]

A prejudiced interpretation of the hairy and fatty nature of the creature, and a belief in unchanging climatic conditions led scientists to deem the woolly mammoth a creature of cold areas of our planet. But furry animals don't necessarily live in a cold climate - see, for example, desert animals like camels, kangaroos and fennecs. They are furry and they live in hot or temperate climate
Woolly mammoth

Woolly mammoth "wool", Naturhistorisches Museum Wien
s. In fact, most furry animals could not survive arctic weather.

What makes for successful cold adaptation is not fur per se but its erectile nature which traps a layer of air for thermal insulation against the cold. Unlike the fur seal for example, mammoths were devoid of erectile fur.

[...]

The above clearly shows that fur is not a proof of cold-adaptation and neither is fat. Fat only proves that food is plentiful. A fat, overfed dog could not withstand an arctic blizzard and its -80F (-60° Celsius) temperatures. On the contrary, creatures like arctic rabbits or caribous can, despite their relative low fat to body mass ratio.

Mammoths remains are usually found piled up with other animals, like tiger, antelope, camel, horse, reindeer, giant beaver, giant ox, musk sheep, musk ox, donkey, badger, ibex, woolly rhinoceros, fox, giant bison, lynx, leopard, wolverine, hare, lion, elk, giant wolf, ground squirrel, cave hyena, bear, and many types of birds. Most of those animals could not survive the arctic climate. This is an extra indication that woolly mammoths were not polar creatures.

French prehistorian Henry Neuville conducted the most detailed study of mammoth skin and hair. At the end of his thorough analysis, he wrote the following: "It appears to me impossible to find, in the anatomical examination of the skin and [hair], any argument in favor of adaptation to the cold."

- H. Neuville, On the Extinction of the Mammoth, Annual Report of the Smithsonian Institution, 1919, p. 332.
See also:


Cardboard Box

GM crops: Experts debunk claims of success

cotton pickers
© Dev Nathan
Women working in BT cotton field in rural Maharashtra
On 6 July 2020, an article extolling the benefits of genetically modified (GM) crops appeared on the BloombergQuint website based on an interview with Dr Ramesh Chand, a member of the key Indian Government think tank Niti Aayog (National Institution for Transforming India). On 17 July, another piece that placed a positive spin on GM crops and gene-editing technology (Feeding 10 Billion People will Require Genetically Modified Food) appeared on the same site.

According to Prof Andrew Paul Gutierrez, Dr Hans R Herren and Dr Peter E Kenmore, internationally renowned agricultural researchers, the pieces reported "sweeping unsupported claims" about the benefits of and need for genetically modified organisms (GMOs) and related technologies in agriculture in India.

The three academics felt that "a responsible and factual response" was required and have written a letter - containing what could be described as the definitive analysis of Bt cotton in India - to Dr Ramesh Chand, Dr Rajiv Kumar (Niti Aayog Vice Chancellor) and Dr Amitabh Kant (Niti Aayog CEO).

Bug

99-million-year-old fossil shows how ants hunted

Fossilised Hell Ant
© New Jersey Institute of Technology
A fossil recently recovered from the age of the dinosaurs is giving scientists the most vivid picture yet of how one of the most enigmatic and fearsome groups of ants to exist once used their uncanny tusk-like mandibles and diverse horns to successfully hunt down victims for nearly 20 million years, before vanishing from the planet...
In findings published Aug. 6 in the journal Current Biology, researchers from New Jersey Institute of Technology (NJIT), Chinese Academy of Sciences and University of Rennes in France have unveiled a stunning 99-million-year-old fossil pristinely preserving an enigmatic insect predator from the Cretaceous Period — a 'hell ant' (haidomyrmecine) — as it embraced its unsuspecting final victim, an extinct relative of the cockroach known as Caputoraptor elegans.

The ancient encounter, locked in amber recovered from Myanmar, offers a detailed glimpse at a newly identified prehistoric ant species Ceratomyrmex ellenbergeri, and presents some of the first direct evidence showing how it and other hell ants once used their killer features — snapping their bizarre, but deadly, scythe-like mandibles in a vertical motion to pin prey against their horn-like appendages.

Researchers say the rare fossil demonstrating the hell ant's feeding mode offers a possible evolutionary explanation for its unusual morphology and highlights a key difference between some of the earliest ant relatives and their modern counterparts, which today uniformly feature mouthparts that grasp by moving together laterally. The hell ant lineage, along with their striking predatory traits, are suspected to have vanished along with many other early ant groups during periods of ecological change around the Cretaceous-Paleogene extinction event 65 million years ago.

"Fossilized behavior is exceedingly rare, predation especially so. As paleontologists, we speculate about the function of ancient adaptations using available evidence, but to see an extinct predator caught in the act of capturing its prey is invaluable," said Phillip Barden, assistant professor at NJIT's Department of Biological Sciences and lead author of the study. "This fossilized predation confirms our hypothesis for how hell ant mouthparts worked ... The only way for prey to be captured in such an arrangement is for the ant mouthparts to move up and downward in a direction unlike that of all living ants and nearly all insects."

"Since the first hell ant was unearthed about a hundred years ago, it's been a mystery as to why these extinct animals are so distinct from the ants we have today," Barden added. "This fossil reveals the mechanism behind what we might call an 'evolutionary experiment,' and although we see numerous such experiments in the fossil record, we often don't have a clear picture of the evolutionary pathway that led to them."

Roses

Digital imaging pioneer Russell Kirsch, inventor of the pixel, dies at 91

Russell Krish digital imaging first digital picture
© Russell Kirsch / NIST
Russell Kirsch
Russell Kirsch, whose research going back to the '50s underlies the entire field of digital imaging, died earlier this week at the age of 91. It's hard to overstate the impact of his work, which led to the first digitally scanned photo and the creation of what we now think of as pixels.

Born to Russian and Hungarian immigrant parents in 1929, Kirsch attended NYU, Harvard and MIT, eventually landing a job at the National Bureau of Standards (later the National Institutes of Science and Technology) that he would keep for the rest of his working life.

Although he researched, coded and theorized for 50 years and even after his retirement, his most famous accomplishment is no doubt the first scanned digital image — decades before the first digital camera.

Comet 2

Triple comet fly-pass imaged by SOHO

Sungrazer Comet
© ESA/NASA/SOHO/Karl Battams
Still shot identifying the comet and the fragments and an animation image below.
First appearances can be deceiving, and one of the latest comet discoveries by SOHO is the perfect example of that!

SOHO is no stranger to discovering new comets - via the NASA-funded Sungrazer Project, the observatory has discovered over 4,000 previously unknown comets since launch in 1995. Most of SOHO's comet discoveries can be categorized into families, or groups, the most famous being the "Kreutz" sungrazer group which accounts for over 85% of the Project discoveries. Only around 4% -some 175 comets- do not appear to belong to any known group or comet family. However, these are often among the most interesting comets and this most recent discovery -SOHO's 4,049th comet- was no exception!


The comet was first spotted on August 5th, 2020, by amateur astronomer Worachate Boonplod. At discovery, it was just a tiny faint smudge near the edge of the C3 coronagraph images recorded SOHO's Large Angle Spectrometric Coronagraph (LASCO) instrument. As it neared the Sun over the next day or so, the smudge became increasingly elongated, ultimately hinting that it may be two comets pretending to be one!

This was confirmed as the comets entered the narrower field of view of the LASCO C2 camera, where the improved resolution confirmed that not only was this more than one comet, it was actually THREE comets! The two main components are easy to spot, with the third a very faint, diffuse fragment following alongside the leading piece.

Blue Planet

125 million year old shell is only the 'third dinosaur egg ever found in Russia' - or it's an early bird

dinosaur egg
© Kuzbass History Museum
125 million year old shell is ‘third dinosaur's egg ever found in Russia’ - or an early bird.
Siberian archeologists report sensational discovery at Dinosaur Graveyard in Kemerovo region.

Pieces of the broken shell still shaped as an egg were found on 8 August at Shestakovo-3 paleontological site.

The fossilised shell was in the same layer where six years ago archeologists found a mass burial of Psittacosaurus, otherwise known as Parrot Lizards - extinct ceratopsian dinosaurs with a high skull and a robust beak that lived between 126 and 101 million years ago (Early Cretaceous).

Back then there were four fully preserved skeletons of these dinosaurs found in the burial.

Psittacosaurus Sibiricus is the largest-known species of Psittacosaurus, with the biggest skull (20.7cm) and two striking features like the longest neck frill and four 'horns' around each eye.

Comment: See also: