Guestbook

Andrewdoone

06 May 2025 - 11:13 am

Water and life
Eth Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

Thomaswrito

06 May 2025 - 10:42 am

Water and life
Ethereum Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

Williamlayep

06 May 2025 - 08:51 am

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
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What would be the ultimate solution to the energy problems of an advanced civilization? Renowned British American physicist Freeman Dyson theorized it would be a shell made up of mirrors or solar panels that completely surrounds a star — harnessing all the energy it produces.

“One should expect that, within a few thousand years of its entering the stage of industrial development, any intelligent species should be found occupying an artificial biosphere which completely surrounds its parent star,” wrote Dyson in a 1960 paper in which he first explained the concept
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If it sounds like science fiction, that’s because it is: Dyson took the idea from Olaf Stapledon’s 1937 novel “Star Maker,” and he was always open about that. The late scientist was a professor emeritus at the Institute of Advanced Study in Princeton, New Jersey.
Still, coming from a thinker who some in the scientific community say might have been worthy of a Nobel Prize early in his career, the concept took hold and the hypothetical megastructures became known as Dyson spheres, even though the physicist later clarified that they would actually consist of “a loose collection or swarm of objects traveling on independent orbits around the star.”

In his paper, Dyson also noted that Dyson spheres would give off waste heat detectable as infrared radiation, and suggested that looking for that byproduct would be a viable method for searching for extraterrestrial life. However, he added that infrared radiation by itself would not necessarily mean extraterrestrial intelligence, and that one of the strongest reasons for searching for such sources was that new types of natural astronomical objects might be discovered.

“Scientists (at the time) were largely receptive, not to the likelihood that alien civilisations would be found to exist, but that a search for waste heat would be a good place to look,” said George Dyson, a technology writer and author and the second of Dyson’s six children, via email. “Science fiction, from ‘Footfall’ to ‘Star Trek,’ took the idea and ran with it, while social critics adopted the Dyson sphere as a vehicle for questioning the wisdom of unlimited technological growth.”

Dannykak

06 May 2025 - 04:14 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
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“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
https://kra30att.cc
kra30 at
“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Victoravaxy

06 May 2025 - 03:05 am

Water and life
Ethereum Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

Donaldtop

06 May 2025 - 01:40 am

Water and life
Ethereum Mixer
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

Fosterfar

05 May 2025 - 11:31 pm

Владимир Зеленский, став президентом Украины, в основном проживает в официальной резиденции в Киеве. Президентская резиденция располагается в здании, известном как Мариинский дворец. Это историческая и культурная жемчужина, служащая официальной резиденцией главы государства и местом проведения церемониальных мероприятий и важных встреч с мировыми лидерами.
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Мариинский дворец расположен в центре Киева и является не только рабочим, но и символическим местом, отражающим важность и статус президента Украины. Помимо этого, президент также может проводить время в других правительственных объектах, которые обеспечивают безопасность и комфорт для выполнения его обязанностей.
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Как президент, Зеленский обязан находиться в столице Украины, чтобы эффективно управлять государственными делами и ответственно выполнять свои функции, в то время как его семья может проживать в других местах по их личному выбору.
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Ramonver

05 May 2025 - 07:38 am

Проверка пропусков на МКАД: как найти и проверить пропуск для грузовиков и автомобилей
рнис москва
Если вам нужно проверить пропуск на МКАД, важно знать, что процесс может быть достаточно простым, если следовать установленным правилам и использовать правильные способы проверки. В современных условиях большинство предприятий и водителей используют онлайн-сервисы для проверки пропуска на МКАД по номеру машины или по номеру автомобиля, что значительно ускоряет процесс и позволяет получить необходимую информацию мгновенно.

Почему важно проверять пропуск в Москве для грузовиков
Особенно актуально это для владельцев грузовых транспортных средств, поскольку пропуск в Москву для грузовиков проверить или проверить пропуск в Москву для грузовиков по номеру автомобиля на портале государственных услуг или через специализированные системы. Это помогает избежать задержек и штрафных санкций при проезде по МКАД и въезде в столичный регион.

Как проверить пропуск на МКАД по номеру автомобиля
Для проверки пропуска на МКД по номеру машины существует несколько простых способов:

Обратиться к онлайн-сервисам, предоставляющим информацию по базе данных ГИБДД.
Использовать официальный сайт МВД или порталы городских властей Москвы.
Ввести номер автомобиля в специальную форму для проверки пропуска на МКАД и получить актуальную информацию о статусе пропуска.
Проверка пропуска в Москве для грузовиков
Чтобы проверить пропуск в Москве для грузовиков по номеру автомобиля, достаточно воспользоваться онлайн-порталами или приложениями, предоставляющими услуги по проверке пропусков. Такой подход помогает оперативно убедиться, есть ли у вашего грузового транспорта действующий пропуск и всё ли в порядке для въезда в город.

Как проверить пропуск на МКАД по номеру машины
Если необходимо проверить пропуск на МКД по номеру автомобиля, рекомендуется:

Перейти на официальный сайт или специализированный сервис.
Ввести актуальный номер автомобиля.
Получить подтверждение или информацию о необходимости оформления нового пропуска.
Что делать при отсутствии пропуска или его истечении
Если пропуск проверить и выяснилось, что он отсутствует или истёк срок действия, необходимо оформить новый или продлить существующий. В большинстве случаев это делается через онлайн-сервисы, что значительно ускоряет процесс и позволяет избежать возможных штрафов.

Roberteviff

04 May 2025 - 11:35 pm

Look of the Week: Naomi Watts is twinning with her canine co-star
openocean fi
What’s white and black and red all over? Naomi Watts and her 145lb co-star, Bing, a Great Dane, taking a dog walk on the crimson carpet for the New York premiere of “The Friend.”

Directed by Scott Mcgehee and adapted from Sigrid Nunez’s 2018 novel of the same name, the film — set to release in US theaters on March 28 and in the UK on April 25 — follows a solitary writer and teacher named Iris whose life is upended after a close friend bequeaths his giant pet dog to her following his death.

In front of the cameras Monday evening, the “Mulholland Drive” actor and Bing looked like they were cut from the same cloth — both in temperament and in their matching black polka dots. Watts was dressed in a white gown with fur-tufted spots that bore a striking resemblance to Bing’s own coat, but the Cruella de Vil comparisons ended there. Instead, Watts and Bing were captured in the throes of lots of paw-shakes, puppy kisses and head scratches.
The dress that Watts wore, titled the “Domino” and designed by Jacquemus, debuted during the Spring-Summer 2025 Paris couture shows in January. The look was both elegant and offbeat, with a high-cowl neck and open-back, asymmetrical waistline that mimicked a French tuck. It was styled with a skirt that sprouted furry black polka dots, which close up were unnervingly reminiscent of body hair. But from afar they gave the impression of soft-edged dabs of watercolor bleeding downstream.

The look was styled by Jeanann Williams, who has also been working with “The White Lotus” star Leslie Bibb. Williams’ decision to coordinate Watts with Bing was a new take on method dressing — the thematic styling trend that has dominated celebrity red carpets since Greta Gerwig’s “Barbie” in 2023. Since then, the sartorial trope, which connects actors to their on-screen characters through clothes, has become somewhat tired — with some observers claiming that the 7-month-long “Wicked” press tour, in which Cynthia Erivo and Ariana Grande became prisoners to the colors green and pink, was peak saturation.
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Scottwep

04 May 2025 - 05:08 pm

Why axolotls seem to be everywhere — except in the one lake they call home
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Scientist Dr. Randal Voss gets the occasional reminder that he’s working with a kind of superstar. When he does outreach events with his laboratory, he encounters people who are keen to meet his research subjects: aquatic salamanders called axolotls.

The amphibians’ fans tell Voss that they know the animals from the internet, or from caricatures or stuffed animals, exclaiming, “‘They’re so adorable, we love them,’” said Voss, a professor of neuroscience at the University of Kentucky College of Medicine. “People are drawn to them.”
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Take one look at an axolotl, and it’s easy to see why it’s so popular. With their wide eyes, upturned mouths and pastel pink coloring, axolotls look cheerful and vaguely Muppet-like.

They’ve skyrocketed in pop culture fame, in part thanks to the addition of axolotls to the video game Minecraft in 2021. These unusual salamanders are now found everywhere from Girl Scout patches to hot water bottles. But there’s more to axolotls than meets the eye: Their story is one of scientific discovery, exploitation of the natural world, and the work to rebuild humans’ connection with nature.

A scientific mystery
Axolotl is a word from Nahuatl, the Indigenous Mexican language spoken by the Aztecs and an estimated 1.5 million people today. The animals are named for the Aztec god Xolotl, who was said to transform into a salamander. The original Nahuatl pronunciation is “AH-show-LOAT”; in English, “ACK-suh-LAHT-uhl” is commonly used.
Axolotls are members of a class of animals called amphibians, which also includes frogs. Amphibians lay their jelly-like eggs in water, and the eggs hatch into water-dwelling larval states. (In frogs, these larvae are called tadpoles.)

Most amphibians, once they reach adulthood, are able to move to land. Since they breathe, in part, by absorbing oxygen through their moist skin, they tend to stay near water.

Axolotls, however, never complete the metamorphosis to a land-dwelling adult form and spend their whole lives in the water.

“They maintain their juvenile look throughout the course of their life,” Voss said. “They’re teenagers, at least in appearance, until they die.”