Libro de Visitas

Donaldhoode

02 May 2025 - 12:32 pm

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.”

Wileypoick

02 May 2025 - 12:11 pm

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
кракен
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
https://kra31s.cc
Площадка кракен
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.”

Darrenblida

01 May 2025 - 09:09 am

Хотелось бы вам владеть ресурсом для изучения английского языка, который обновляется каждый день? Если да (а мы уверены, что – да), тогда учите английский при помощи новостей!


Breaking news (последние новости), новые и оригинальные истории привлекают внимание и одновременно улучшают ваши знания английского. Они познакомят вас с важной повседневной лексикой и помогут лучше освоить структуру английского предложения. Кроме того, изучение новостей на английском может помочь в общении с носителями языка. Когда вы будете знать, что происходит в мире, в котором они живут, сможете лучше говорить на их языке. А еще всегда будет о чем поговорить!

Вам точно понравится удобство изучения английского с помощью новостей, чтения статей в интернете, прослушивания новостных подкастов или просмотра роликов в приложении в любое удобное время и в любом месте. И мы не будем ограничиваться только роликами с субтитрами на ютубе.

Предлагаем список ресурсов для просмотра и чтения новостей на английском языке. Некоторые из них созданы специально для изучающих язык, другие – аутентичные медиа, давно полюбившиеся носителям языка.

E-news
E-news

Один из новых ресурсов, созданный специально для тех, кто изучает английский. Подойдет как для уровня Elementary, так и для Advanced. Здесь вы можете читать новости о политике, науке, технологиях, спорте, путешествиях и пр. Кроме того, можете быстро найти интересующую тему, используя теги.

Сайт еженедельно освещает множество событий. Например, читайте релиз о «Фантастических тварях, и где они обитают» в 3-х разных вариантах, соответствующих каждому уровню изучения языка.

В каждой статье выделены основные слова с переводом на русский. Наведите на них курсором и увидите его в контексте. Еще одна крутая фишка – аудиосопровождение, которое вы выбираете в зависимости от уровня вашего английского.
kra31 at
В целом, сайт очень круто оформлен и удобен для пользователя.

The Times in Plain English


Как сказано на главной странице – The Times in Plain English («The Times на понятном/простом английском) это «четкое написание» для «глобального прочтения». Сервис помогает понимать читателям по всему миру подлинные английские новостные статьи. Это означает, что новички могут получать свою дозу свежих новостей без необходимости обращаться за каждым вторым словом к словарю.
kra31 at
Сайт берет статьи из различных публикаций, в том числе и The New York Times, и переписывает их, используя простые слова и короткие предложения. Здесь освещаются темы здоровья, образования, законов, иммиграции, денег и работы. Также вы найдете ссылку на оригинальную статью, если захотите усложнить себе задачу.


К сожалению, сейчас в сети очень много посредственного контента. А когда вы не носитель языка, вам такой контент не нужен. Нужен – качественный.
kra31
Что делать? Читайте аутентичные (подлинные) новостные статьи с четким и ясным языком, написанные людьми разных культур.

USA Today
USA Today может многое предложить не носителям языка. Статьи написаны в лаконичном и прямом стиле. Здесь вы найдете актуальные новости США, множество тем о науке и технике, спорте и путешествиях, колонки различных авторов.

The Guardian Newspapers
The Guardian Newspapers

The Guardian – еще один отличный online источник различных английских новостных историй. Кроме того, он предлагает несколько вариантов: The Guardian – для американцев, The Guardian – для англичан. Выбирайте, какой английский вам больше по душе, и читайте.

Сервисы располагают огромной коллекцией новостных статей, посвященных политическому миру, бизнесу, образу жизни и пр.

В The Guardian`s Long Read вы найдете поистине крутой материал для улучшения навыков чтения и аудирования.

The New York Times` Times Minute
kra31.at

https://kra-31.at

Dannyhog

01 May 2025 - 07:38 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.
kra30 at
“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
kra 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.”

Williamenrow

01 May 2025 - 07:24 am

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
kraken даркнет
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
https://kra31s.cc
kra30cc
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.”

Jamespaw

01 May 2025 - 03:09 am

Axolotl problems
As Mexico City grew and became more industrialized, the need for water brought pumps and pipes to the lake, and eventually, “it was like a bad, smelly pond with rotten water,” Zambrano said. “All of our aquatic animals suffer with bad water quality, but amphibians suffer more because they have to breathe with the skin.”
lucky jet играть
To add to the axolotls’ problems, invasive fish species such as carp and tilapia were introduced to the lake, where they feed on axolotl eggs. And a 1985 earthquake in Mexico City displaced thousands of people, who found new homes in the area around the lake, further contributing to the destruction of the axolotls’ habitat.

These combined threats have devastated axolotl populations. According to the International Union for Conservation of Nature, there are fewer than 100 adult axolotls left in the wild. The species is considered critically endangered.
https://lucky-jetts.com
лаки джет играть
While the wild axolotls of Lake Xochimilco have dwindled to near-extinction, countless axolotls have been bred for scientific laboratories and the pet trade. “The axolotl essentially helped establish the field of experimental zoology,” Voss said.

In 1864, a French army officer brought live axolotls back to Europe, where scientists were surprised to learn that the seemingly juvenile aquatic salamanders were capable of reproduction. Since then, scientists around the world have studied axolotls and their DNA to learn about the salamanders’ unusual metamorphosis (or lack thereof) as well as their ability to regrow injured body parts.
In addition to their role in labs, axolotls have become popular in the exotic pet trade (though they are illegal to own in California, Maine, New Jersey and Washington, DC). However, the axolotls you might find at a pet shop are different from their wild relatives in Lake Xochimilco. Most wild axolotls are a dark grayish brown. The famous pink axolotls, as well as other color variants such as white, blue, yellow and black, are genetic anomalies that are rare in the wild but selectively bred for in the pet trade.

What’s more, “most of the animals in the pet trade have a very small genetic variance,” Zambrano said. Pet axolotls tend to be inbred and lack the wide flow of different genes that makes up a healthy population in the wild. That means that the axolotl extinction crisis can’t simply be solved by dumping pet axolotls into Lake Xochimilco. (Plus, the pet axolotls likely wouldn’t fare well with the poor habitat conditions in the lake.)

Roberttek

30 Apr 2025 - 03:52 pm

Axolotl problems
As Mexico City grew and became more industrialized, the need for water brought pumps and pipes to the lake, and eventually, “it was like a bad, smelly pond with rotten water,” Zambrano said. “All of our aquatic animals suffer with bad water quality, but amphibians suffer more because they have to breathe with the skin.”
lucky jet играть
To add to the axolotls’ problems, invasive fish species such as carp and tilapia were introduced to the lake, where they feed on axolotl eggs. And a 1985 earthquake in Mexico City displaced thousands of people, who found new homes in the area around the lake, further contributing to the destruction of the axolotls’ habitat.

These combined threats have devastated axolotl populations. According to the International Union for Conservation of Nature, there are fewer than 100 adult axolotls left in the wild. The species is considered critically endangered.
https://lucky-jetts.com
lucky jet игра
While the wild axolotls of Lake Xochimilco have dwindled to near-extinction, countless axolotls have been bred for scientific laboratories and the pet trade. “The axolotl essentially helped establish the field of experimental zoology,” Voss said.

In 1864, a French army officer brought live axolotls back to Europe, where scientists were surprised to learn that the seemingly juvenile aquatic salamanders were capable of reproduction. Since then, scientists around the world have studied axolotls and their DNA to learn about the salamanders’ unusual metamorphosis (or lack thereof) as well as their ability to regrow injured body parts.
In addition to their role in labs, axolotls have become popular in the exotic pet trade (though they are illegal to own in California, Maine, New Jersey and Washington, DC). However, the axolotls you might find at a pet shop are different from their wild relatives in Lake Xochimilco. Most wild axolotls are a dark grayish brown. The famous pink axolotls, as well as other color variants such as white, blue, yellow and black, are genetic anomalies that are rare in the wild but selectively bred for in the pet trade.

What’s more, “most of the animals in the pet trade have a very small genetic variance,” Zambrano said. Pet axolotls tend to be inbred and lack the wide flow of different genes that makes up a healthy population in the wild. That means that the axolotl extinction crisis can’t simply be solved by dumping pet axolotls into Lake Xochimilco. (Plus, the pet axolotls likely wouldn’t fare well with the poor habitat conditions in the lake.)

Danielsef

28 Apr 2025 - 04:01 pm

“Every morning I come downstairs and he’s already done the dishwasher, he’s already packed his lunch, and he’s ready to go,” Ruthe’s father, Ben, tells CNN Sports.

“He’s just a disciplined kid. He goes to bed early, he looks after himself, he eats well, he looks after his sister. He’s just a good kid around the house in all ways, really. We’re very lucky.”
pendle
Ruthe is next due to compete in the 1,500 meters at the Maurie Plant Meet in Melbourne on Saturday, and one target time to aim for will be his dad’s fastest time of 3:41.22 – three hundredths of a second faster than Ruthe’s current personal best.
But he still has a way to go before he can call himself the most decorated runner in his family. Dad Ben and mom Jess are both former national champions who represented New Zealand on the world stage, while his maternal grandparents won European championship medals for Great Britain.

His grandmother, Rosemary Stirling, arguably had the most impressive achievement: an 800m Commonwealth Games title from 1970.

Despite his family pedigree, Ruthe was never under any pressure to take running seriously. His parents, in fact, didn’t allow him or his sister Daisy to train at all until they were 13, never wanting their identities to be tied solely to running.

“It feels like it’s the right decision about now,” says Ben.

But as he gradually starts to realize his potential, Ruthe, when pushed, admits to having big goals in the sport.

“If I had to pick one thing, definitely Olympic gold,” he says. “I feel like that’s most runners’ dream and the biggest thing you can actually win. So that’ll definitely be the top of my bucket list.”
The 2032 Olympics in Brisbane, Ruthe adds, would be a nice target. And as for the Los Angeles Games in three years’ time? “I’d actually love to try and qualify for LA 28,” he says. “I feel like that’ll be a tough goal. But if I do that, I’ll be really happy.”

Already, Ruthe’s name is being mentioned in the same breath as Norway’s Jakob Ingebrigtsen, the most successful middle-distance of this generation. It was his record as the youngest-ever four-minute miler that Ruthe took last week, and the New Zealander also beat Ingebrigtsen’s 1,500m record for a 15-year-old earlier this year.

Ingebrigtsen’s success, Ruthe says, has given him hope that he too can “have a good future” in the sport. But his biggest source of motivation comes not from the two-time Olympic champion, but from those closest to him – his training group led by coach Craig Kirkwood and athlete Sam Tanner.

The pair were instrumental in Ruthe’s recent mile time of 3:58.35, and it was five-time national champion Tanner who paced him perfectly around four laps of the track on his way to the record.

Charlesanelp

28 Apr 2025 - 03:01 pm

Aged 15, New Zealander Sam Ruthe has already run a four-minute mile. He would ‘love to try and qualify’ for the 2028 Olympics
[url=https://parasvvap.com]paraswap[/url]

Sam Ruthe had the eyes of thousands on him when he stepped onto a running track in Auckland just over a week ago.

Undaunted by the occasion, Ruthe went on to become the first 15-year-old to run a sub-four-minute mile, even managing a nonchalant shrug of the shoulders as he crossed the finish line.

The race was almost entirely engineered for the high school student to break the fabled four-minute barrier – a feat first achieved by Roger Bannister more than 70 years ago – but the weight of running history was a burden that Ruthe seemed to bear lightly.

The first three laps, he later said in a video documenting the race, “felt pretty comfortable – nothing too crazy.”

Perhaps the most intimidating part of his achievement occurred when Ruthe returned to school the next day, only to be immediately called into the principal’s office.

“He’s like, ‘Alright, so you’re gonna have to go up on stage and we’ll get the whole school to clap you,’” Ruthe tells CNN Sports’ Patrick Snell. “It was really scary, actually. I headed into class and everyone thought I was famous.”

It’s easy to forget, given his history-making performance last week, that Ruthe is like most other 15-year-olds in New Zealand. He goes to school, spends time with his friends, and helps with chores around the house.

He also just happens to be one of the most exciting middle-distance runners on the planet, one of the latest star athletes to emerge from sports-mad New Zealand.

Byronpar

28 Apr 2025 - 11:28 am

Critics say this power imbalance is clear in the 2016 contract Guyana signed with Exxon. Under the agreement, Exxon keeps 75% of everything it makes from its oil operations in Guyana, with the remaining 25% shared equally between the company and the government, which also takes a 2% royalty.
lido fi
“It was a bad deal,” Ali said in the BBC interview, but he has rejected the idea of unilaterally changing the agreement, which was signed by the previous government. He says the next contract with Exxon will be on different terms.

An Exxon spokesperson said the contract is “globally competitive for countries at a similar stage of exploration” and said Guyana is averaging $1 billion a year in “oil profits.”

Exxon has also faced a number of lawsuits over its potential environmental impact, many filed by Melinda Janki, a Guyanese international lawyer, who drafted the country’s Environmental Protection Act back in the 1990s.

A big victory for Guyana’s people and environment came in 2023, when the court ruled Exxon should have unlimited liability for the costs of any oil spill. Exxon has since appealed the ruling and has posted a $2 billion guarantee while it awaits the appeal outcome.
Exxon said this commitment supplements “its robust balance sheets … and the insurance policies they already had in place.” Janki says this isn’t enough. Offshore oil spills can be extremely expensive to deal with, the 2010 Deepwater Horizon spill cost nearly $70 billion to clean up.

The push and pull between those who say oil offers Guyana a brighter future and those who fear the industry’s impact will continue.

Exxon said it’s had a positive impact on the country, including employing more than 6,200 people, investing more than $2 billion with local Guyanese businesses since 2015 and spending more than $43 million on community projects.