Libro de Visitas

Gabrielgrerb

27 Apr 2025 - 01:00 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.”
гей порно видео
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.
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.)

Fame and misfortune
The difficulties that axolotls face in the wild are almost diametrically opposed to the fame they’ve found in recent years. Axolotls have captured the human imagination for centuries, as evidenced by their roles in Aztec religion and stories, but the early 21st century seems to be a high point for them. An axolotl graces the 50 peso bill. There are axolotl-inspired Pokemon, and Reddit commenters have noted that the character Toothless from the “How to Train Your Dragon” movie series is distinctly axolotl-like.

The introduction of axolotls to Minecraft in 2021 neatly mapped onto an uptick in Google searches for the animals, and social media makes it easy for people to gain access to photos and videos of the salamanders, particularly the photogenic pink ones often kept as pets.

The axolotl pet trade probably doesn’t directly harm the wild populations since wild salamanders aren’t being poached or taken from Lake Xochimilco. However, Zambrano said, axolotls’ ubiquity in pop culture and pet stores might make people assume that because axolotls “live in all the tanks around the world, they are not in danger.”

Allanmedex

27 Apr 2025 - 12:51 am

Why axolotls seem to be everywhere — except in the one lake they call home
большой анальный секс

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.”

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.”

Daviddat

26 Apr 2025 - 10:36 pm

By Henry Austin
A Russian-American woman who was imprisoned for treason by Russia has been freed, Secretary of State Marco Rubio said Thursday.
mg2 at
Former ballerina Ksenia Karelina was born in Russia but had built a new life as an aesthetician at a Los Angeles spa after immigrating to the United States over a decade ago. She “is on a plane back home to the United States,” having been “wrongfully detained by Russia for over a year,” Rubio said on in a post on X. He credited President Donald Trump with securing her release.
mega2onq5nskz5ib5cg3a2aqkcprqnm3lojxtik2zeou6au6mno7d4ad
Karolina’s lawyer, Mikhail Mushailov, confirmed her release in a statement on Instagram. “Two hours ago she was in touch with her relatives and took off from Abu Dhabi to the U.S.,” he wrote, adding that he had known about her release since Tuesday.
mega2ousbpnmmput4tiyu4oa4mjck2icier52ud6lmgrhzlikrxmysid onion
Russia’s Federal Security Service (FSB) detained Karelina in January 2024 while she was visiting her parents and young sister in the city Yekaterinburg. It did not provide further details or evidence of her alleged crime.
mega2ousbpnmmput4tiyu4oa4mjck2icier52ud6lmgrhzlikrxmysid.onion
At the time, Russian legal group Perviy Otdel said it had information that Karelina had donated just over $51.80 from her U.S. bank account on Feb. 24, 2022 — the day that Russia launched its full-scale invasion of Ukraine — to a charity that sends aid to Ukraine. A spa where she had previously worked confirmed this in a statement on Facebook.

Although Russia’s FSB did not confirm that figure, it said Karelina’s donation “was subsequently used to purchase tactical medical supplies, equipment, weapons, and ammunition for the Ukrainian armed forces.”

She was sentenced in August to 12 years in a penal colony for “high treason,” having “fully admitted her guilt” at a closed trial in the southwestern Russian city of Yekaterinberg, Sverdlovsky Region Court said in a news release at the time.

The sentence came against the backdrop of Russia’s 3-year-long war with Ukraine during which President Vladimir Putin’s government has cracked down on dissent. Any perceived criticism of the military is banned.

Recommended
mega2oakke6o6mya3lte64b4d3mrq2ohz6waamfmszcfjhayszqhchqd onion

https://mega2ousbpnmmput4tiyu4oa4mjck2icier52ud6lmgrhzlikrxmysid.com

Ronaldfed

26 Apr 2025 - 10:23 pm

Outdoor Space Upgrades Made Easy

Outdoor spaces, such as backyards, patios, or outdoor sections, can be a peaceful escape from everyday life. With the appropriate elements and plans, you can simply convert your outdoor area into something attractive and usable.

One way to upgrade an outdoor space is by incorporating natural resources like wood, wood, or trees. Installing stone pathways or a wooden deck can provide structure while still complementing the environment. You can also use different types of plants to offer color and texture, changing your yard into a lush, green getaway.

Another concept is to build specific areas for particular activities. For instance, a cozy seating area with outdoor furniture and lights can provide the ideal spot to unwind with friends or family. Look into using weather-resistant components to maintain your seating area looking great all year long. Installing a fire pit or a small water feature, like a fountain, can also improve the atmosphere.

If you are looking for your outdoor space to grab attention, explore incorporating DIY projects. Crafting your own planters, garden beds, or even building a pergola can add your space a personal touch. These projects can be achieved using common resources like reclaimed wood or stone, making them both affordable and rewarding.

With a little creativity and the correct components, your outdoor space can transform into an beautiful extension of your home, perfect for chilling or hosting friends.

Examining the different kinds of masonry stone for retaining walls. a60bf63

Best bluestone pavers for countrywide delivery

Davidacous

26 Apr 2025 - 08:23 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.

Chestertiz

26 Apr 2025 - 08:10 pm

Curiosity has maintained pristine pieces of the Cumberland sample in a “doggy bag” so that the team could have the rover revisit it later, even miles away from the site where it was collected. The team developed and tested innovative methods in its lab on Earth before sending messages to the rover to try experiments on the sample.
changelly
In a quest to see whether amino acids, the building blocks of proteins, existed in the sample, the team instructed the rover to heat up the sample twice within SAM’s oven. When it measured the mass of the molecules released during heating, there weren’t any amino acids, but they found something entirely unexpected.

An intriguing detection
The team was surprised to detect small amounts of decane, undecane and dodecane, so it had to conduct a reverse experiment on Earth to determine whether these organic compounds were the remnants of the fatty acids undecanoic acid, dodecanoic acid and tridecanoic acid, respectively.

The scientists mixed undecanoic acid into a clay similar to what exists on Mars and heated it up in a way that mimicked conditions within SAM’s oven. The undecanoic acid released decane, just like what Curiosity detected.

Each fatty acid remnant detected by Curiosity was made with a long chain of 11 to 13 carbon atoms. Previous molecules detected on Mars were smaller, meaning their atomic weight was less than the molecules found in the new study, and simpler.
“It’s notable that non-biological processes typically make shorter fatty acids, with less than 12 carbons,” said study coauthor Dr. Amy Williams, associate professor of geology at the University of Florida and assistant director of the Astraeus Space Institute, in an email. “Larger and more complex molecules are likely what are required for an origin of life, if it ever occurred on Mars.”

Ckcharles

26 Apr 2025 - 05:18 pm

Imagine transforming a traditional visitor's book into an interactive, dynamic, and visually stunning experience using Corel Draw. Have you ever attempted such a project, or what unique twists have you added to your visitor's books to make them more memorable?

Чи знали ви, що звички впливають на ваше життя? [url=https://justtips.online]Ось як змінити їх на кращі[/url]!

Lloydcrags

26 Apr 2025 - 03:54 pm

Tesla is bringing its electric cars to oil-rich Saudi Arabia amid falling global sales
[url=https://arperturlefinamce.fi]aperture finance[/url]
Tesla will start selling its electric vehicles in Saudi Arabia, entering the Gulf region’s largest economy as the company’s global sales are sliding and CEO Elon Musk courts controversy with his role in the US government.

The carmaker announced Wednesday that it would host a launch event in the kingdom on April 10, where it will showcase its EVs. Attendees will also have the chance to “experience the future of autonomous driving with Cybercab and meet Optimus, our humanoid robot, as we showcase what’s next in AI and robotics,” Tesla (TSLA) said.

Tesla may struggle to gain market share in oil-rich Saudi Arabia as EVs make up a little over 1% of all car sales in the country, according to a report by consultancy PwC published in September.
Tesla’s entry into the new market comes as the company fights battles on several fronts.

Last year, it recorded the first annual decline in sales in its history as a public company, posting a drop of 1%.

The company is facing intensifying competition in China, the world’s largest auto market. On Tuesday, BYD, a Chinese maker of electric and hybrid cars, reported $107 billion in annual sales for 2024, beating the near-$98 billion notched by Tesla.

And last week, BYD unveiled an ultra-fast charging system, which it said was capable of adding 250 miles (402 km) of range in just five minutes, easily outdoing Tesla’s charging technology. Tesla’s Superchargers take 15 minutes to charge an EV, providing a range of 200 miles.

Tesla has also suffered slumping sales in Europe. In February, the carmaker sold around 40% fewer vehicles on the continent compared with the same month in 2024, according to the European Automobile Manufacturers’ Association.

Jasonkiz

26 Apr 2025 - 03:45 pm

Arctic auroras
[url=https://efhenna.net]ethena[/url]
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.

Rcaaron

26 Apr 2025 - 05:58 am

¿Has utilizado alguna vez Corel Draw para crear algo más que una página genérica en un libro de visitas? Deberías compartir tus técnicas para crear un libro de visitas personalizado y efectivo.

Якщо ви шукаєте нові казки для дітей, то ось [url=https://justtips.online]цікава добірка[/url].