Guestbook

Claudedop

02 May 2025 - 10:10 pm

Привет, путешественники! Вы задумывались о поездке за границу? Я недавно нашёл полезный раздел с советами и узнал о лучших местах для отдыха в Испании. Благодаря рекомендациям сайта я составил маршрут, который включает Барселону, Севилью и Валенсию. Это будет путешествие мечты! Если вы хотите узнать больше, обязательно загляните на этот сайт.

Davidwhest

02 May 2025 - 09:57 pm

While the Cumberland sample may contain longer chains of fatty acids, SAM is not designed to detect them. But SAM’s ability to spot these larger molecules suggests it could detect similar chemical signatures of past life on Mars if they’re present, Williams said.
convex finance
“Curiosity is not a life detection mission,” Freissinet said. “Curiosity is a habitability detection mission to know if all the conditions were right … for life to evolve. Having these results, it’s really at the edge of the capabilities of Curiosity, and it’s even maybe better than what we had expected from this mission.”

Before sending missions to Mars, scientists didn’t think organic molecules would be found on the red planet because of the intensity of radiation Mars has long endured, Glavin said.
Curiosity won’t return to Yellowknife Bay during its mission, but there are still pristine pieces of the Cumberland sample aboard. Next, the team wants to design a new experiment to see what it can detect. If the team can identify similar long-chain molecules, it would mark another step forward that might help researchers determine their origins, Freissinet said.

“That’s the most precious sample we have on board … waiting for us to run the perfect experiment on it,” she said. “It holds secrets, and we need to decipher the secrets.”

Briony Horgan, coinvestigator on the Perseverance rover mission and professor of planetary science at Purdue University in West Lafayette, Indiana, called the detection “a big win for the whole team.” Horgan was not involved the study.
“This detection really confirms our hopes that sediments laid down in ancient watery environments on Mars could preserve a treasure trove of organic molecules that can tell us about everything from prebiotic processes and pathways for the origin of life, to potential biosignatures from ancient organisms,” Horgan said.

Dr. Ben K.D. Pearce, assistant professor in Purdue’s department of Earth, atmospheric, and planetary sciences and leader of the Laboratory for Origins and Astrobiology Research, called the findings “arguably the most exciting organic detection to date on Mars.” Pearce did not participate in the research.

Jasonadele

02 May 2025 - 09:34 pm

Arctic auroras
ethena
For getting around during winter, the Inuit here nowadays prefer snowmobiles, although they still keep their sled dogs. During winter they’ll offer intrepid visitors, wrapped up warm against the deep-freeze temperatures, dog-sledding jaunts. These can last either an hour or be part of expeditions over several days, sometimes with the added experience of learning how to build an igloo. Sisimiut on the west coast and Tasilaq in the southeast are active winter centers for dog sledding.

Winter’s most stellar attraction, though, is northern lights watching. With little urban light pollution, Greenland is a dark canvas for spectacular displays, and aurora borealis-watching vacations are becoming more popular.

Staying outdoors, Greenland is developing a reputation among adventure enthusiasts: from long-distance skiing expeditions and heliskiing on the icecap to hiking the 100-mile-long Arctic Circle Trail from Kangerslussuaq, where firearms need to be carried for warning shots in case of polar bear encounters.

Life is definitely changing here. The climate crisis is eating away at its icecap and Greenland may well end up as a pawn in a game of geopolitical chess. But for now, the bright glare of international attention should shine a favorable light on one of the wildest travel destinations on Earth.

Travel writer Mark Stratton is an Arctic specialist who has traveled to Greenland six times and counting. He’s marveled at the aurora borealis, sailed to Disko Island, dog-sledded with the Inuit, and once got stuck in an icefloe.

Modestonub

02 May 2025 - 08:06 pm

Tbilisi, Georgia — Jailed journalist Mzia Amaghlobeli gets weaker every day as her hunger strike has reached three weeks in Rustavi, a town near the Georgian capital of Tbilisi, her lawyer says. Now the 49-year-old is having difficulty walking the short distance from her cell to the room where they usually meet, and human rights officials, colleagues and family fear for her life.
kra27 at
Amaghlobeli was arrested Jan. 12 during an anti-government protest in the coastal city of Batumi, one of over 40 people in custody on criminal charges from a series of demonstrations that have hit the South Caucasus nation of 3.7 million in recent months.
kra27.at
The political turmoil follows a parliamentary election that was won by the ruling Georgian Dream party, although its opponents allege the vote was rigged.

Protests highlight battle over Georgia's future. Here's why it matters.
Its outcome pushed Georgia further into Russia's orbit of influence. Georgia aspired to join the European Union, but the party suspended accession talks with the bloc after the election.

As it sought to cement its grip on power, Georgian Dream has cracked down on freedom of assembly and expression in what the opposition says is similar to President Vladimir Putin's actions in neighboring Russia, its former imperial ruler.
kra29 cc
https://at-kra27.cc

Martininels

02 May 2025 - 06:36 pm

A job for the Webb space telescope
Кракен тор
“We got 53 candidates for anomalies that cannot be well explained, but can’t say that all of them are Dyson sphere candidates, because that’s not what we are specifically looking for,” said Gabriella Contardo, a postdoctoral research fellow at the International School for Advanced Studies in Trieste, Italy, who led the earlier study. She added that she plans to check the candidates against Suazo’s model to see how many tie into it.
https://kra31att.cc
kra31 at
“You need to eliminate all other hypotheses and explanations before saying that they could be a Dyson sphere,” she added. “To do so you need to also rule out that it’s not some kind of debris disk, or some kind of planetary collision, and that also pushes the science forward in other fields of astronomy — so it’s a win-win.”

Both Contardo and Suazo agree that more research is needed on the data, and that ultimately they could turn to NASA’s James Webb Space Telescope for more information, as it is powerful enough to observe the candidate stars directly. However, because of the lengthy, competitive procedures that regulate use of the telescope, securing access might take some time.
If Dyson spheres really exist, what could they be used for? “If you picture ourselves having as much energy as the sun is providing every second, we could do unheard of things,” Suazo said. “We could do interstellar travel, maybe we could even move the entire solar system to our preferred location, if we wanted.”

But don’t hold your breath, because the technology and the raw materials required to build the hypothetical structures are far beyond humanity’s grasp.

“They are so big that everything we have on Earth would not be enough to build them,” Suazo added. “Freeman Dyson said that we should dismantle Jupiter — the whole planet (for the raw materials).”

That supercolossal scale probably means that Dyson spheres, if they exist at all, are very rare.

Michaellaste

02 May 2025 - 05:30 pm

A job for the Webb space telescope
kra30 at
“We got 53 candidates for anomalies that cannot be well explained, but can’t say that all of them are Dyson sphere candidates, because that’s not what we are specifically looking for,” said Gabriella Contardo, a postdoctoral research fellow at the International School for Advanced Studies in Trieste, Italy, who led the earlier study. She added that she plans to check the candidates against Suazo’s model to see how many tie into it.
https://kra31att.cc
kraken ссылка
“You need to eliminate all other hypotheses and explanations before saying that they could be a Dyson sphere,” she added. “To do so you need to also rule out that it’s not some kind of debris disk, or some kind of planetary collision, and that also pushes the science forward in other fields of astronomy — so it’s a win-win.”

Both Contardo and Suazo agree that more research is needed on the data, and that ultimately they could turn to NASA’s James Webb Space Telescope for more information, as it is powerful enough to observe the candidate stars directly. However, because of the lengthy, competitive procedures that regulate use of the telescope, securing access might take some time.
If Dyson spheres really exist, what could they be used for? “If you picture ourselves having as much energy as the sun is providing every second, we could do unheard of things,” Suazo said. “We could do interstellar travel, maybe we could even move the entire solar system to our preferred location, if we wanted.”

But don’t hold your breath, because the technology and the raw materials required to build the hypothetical structures are far beyond humanity’s grasp.

“They are so big that everything we have on Earth would not be enough to build them,” Suazo added. “Freeman Dyson said that we should dismantle Jupiter — the whole planet (for the raw materials).”

That supercolossal scale probably means that Dyson spheres, if they exist at all, are very rare.

Vincentevilt

02 May 2025 - 02:38 pm

A job for the Webb space telescope
кракен ссылка
“We got 53 candidates for anomalies that cannot be well explained, but can’t say that all of them are Dyson sphere candidates, because that’s not what we are specifically looking for,” said Gabriella Contardo, a postdoctoral research fellow at the International School for Advanced Studies in Trieste, Italy, who led the earlier study. She added that she plans to check the candidates against Suazo’s model to see how many tie into it.
https://kra31att.cc
kra30 at
“You need to eliminate all other hypotheses and explanations before saying that they could be a Dyson sphere,” she added. “To do so you need to also rule out that it’s not some kind of debris disk, or some kind of planetary collision, and that also pushes the science forward in other fields of astronomy — so it’s a win-win.”

Both Contardo and Suazo agree that more research is needed on the data, and that ultimately they could turn to NASA’s James Webb Space Telescope for more information, as it is powerful enough to observe the candidate stars directly. However, because of the lengthy, competitive procedures that regulate use of the telescope, securing access might take some time.
If Dyson spheres really exist, what could they be used for? “If you picture ourselves having as much energy as the sun is providing every second, we could do unheard of things,” Suazo said. “We could do interstellar travel, maybe we could even move the entire solar system to our preferred location, if we wanted.”

But don’t hold your breath, because the technology and the raw materials required to build the hypothetical structures are far beyond humanity’s grasp.

“They are so big that everything we have on Earth would not be enough to build them,” Suazo added. “Freeman Dyson said that we should dismantle Jupiter — the whole planet (for the raw materials).”

That supercolossal scale probably means that Dyson spheres, if they exist at all, are very rare.

Miriamver

02 May 2025 - 02:07 pm

Might feel off-topic, but maybe not entirely

A couple of scrolls ago I stumbled on a site called talabout.com.

It’s full of real-life stories with people from all walks of life — genuine, not your typical media stuff.

Sometimes the vibe there really echoes the stuff being shared here.

Anyone else seen it?

Andrewesowl

02 May 2025 - 11:05 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.”

Jasonkeedo

02 May 2025 - 07:49 am

download # **Free Subnet Scanner for Windows: Find Vulnerabilities and Customize** ## **Introduction** Network security is a critical aspect of IT infrastructure, and identifying vulnerabilities within subnets is essential for maintaining a secure environment. A **subnet scanner** is a powerful tool that helps administrators discover active hosts, open ports, and potential security flaws. For Windows users, finding a **free, customizable subnet scanner** can be challenging. This article explores a **free Windows-compatible subnet scanner** that detects vulnerabilities and allows further development. ## **What is a Subnet Scanner?** A subnet scanner is a tool that scans IP ranges within a network to identify active devices, services, and potential security weaknesses. It helps in: - **Discovering live hosts** within a subnet - **Detecting open ports** and running services - **Identifying vulnerabilities** such as outdated software or misconfigurations - **Generating reports** for security audits ## **Best Free Subnet Scanner for Windows** Several free tools can scan subnets on Windows, but one of the most powerful and customizable options is **Nmap** (Network Mapper). ### **Why Nmap?** - **Free and Open-Source** – Available under the GNU GPL license. - **Cross-Platform** – Works on Windows, Linux, and macOS. - **Extensive Scanning Capabilities** – Supports host discovery, port scanning, OS detection, and vulnerability assessment. - **Scriptable** – Uses the **Nmap Scripting Engine (NSE)** to automate security checks. ### **How to Use Nmap for Subnet Scanning on Windows** 1. **Download and Install** - Get Nmap from the official website: //nmap.org](https://nmap.org) - Install the **Zenmap** GUI for an easier experience. 2. **Basic Subnet Scan** - Open **Command Prompt** or **Zenmap**. - Enter: ``` nmap -sn 192.168.1.0/24 ``` - This performs a **ping sweep** to find live hosts. 3. **Port and Vulnerability Scanning** - Scan for open ports: ``` nmap -p 1-1000 192.168.1.0/24 ``` - Use NSE scripts for vulnerability detection: ``` nmap --script vuln 192.168.1.1 ``` 4. **Exporting Results** - Save scan results in different formats: ``` nmap -oN output.txt 192.168.1.0/24 ``` ## **Customizing and Developing the Scanner** Since Nmap is open-source, developers can: - **Extend functionality** by writing custom NSE scripts. - **Integrate with other tools** like Metasploit for penetration testing. - **Automate scans** using Python or PowerShell. ### **Example: Python Script for Automated Scanning** ```python import nmap scanner = nmap.PortScanner() scanner.scan(hosts='192.168.1.0/24', arguments='-sn') for host in scanner.all_hosts(): print(f"Host: host is up.") ``` ## **Alternative Free Subnet Scanners** - **Advanced IP Scanner** – Simple GUI-based scanner for quick subnet discovery. - **Angry IP Scanner** – Lightweight, portable, and supports plugin development. - **SoftPerfect Network Scanner** – Offers advanced features like remote access checks. ## **Conclusion** A **free subnet scanner for Windows**, such as **Nmap**, provides robust capabilities for detecting vulnerabilities and securing networks. Its open-source nature allows customization, making it ideal for both security professionals and developers. By leveraging such tools, organizations can proactively identify and mitigate security risks. For those looking to **develop their own scanner**, Nmap’s scripting engine and API offer endless possibilities. Download it today and enhance your network security posture! --- **Word Count: ~450** Would you like any modifications or additional details?