Tag Archives: fur

Genetic Engineers Bring Back Extinct Wolves with White Fur and Improved Well-Being

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A company aiming to revive lost species has revealed three genetically designed wolves in the US that resemble extinct dire wolves. These wolves are seen sprinting, sleeping, and howling in their private, safe spaces.

The wolf puppies, aged 3 to 6 months, have long white hair, muscular chins, and weigh around 80 pounds. According to Giant Biology, this revelation was made on Monday.

Dire wolves, which went extinct over 10,000 years ago, were much larger than their closest living relatives today.

While independent scientists caution that this effort does not mean the dire wolves will return to North American grasslands soon, the lead scientist on the project, Beth Shapiro from Colossal, explained the process of genetically modifying blood cells from live grey wolves to create these genetically engineered puppies.

Colossal previously worked on similar projects, including creating animals resembling extinct woolly mammoths and dodos.

Although the puppies physically resemble young dire wolves, experts like Matt James, Colossal’s animal care expert, note they may lack certain behaviors vital for survival in the wilderness.

Colossal also reported cloning four red wolves using blood drawn from wild wolves to enhance genetic diversity among the endangered red wolf population.

While the technology may have broader applications for species conservation, challenges like sedating wild wolves for blood collection still remain.

Colossal’s CEO, Ben Lamm, met with officials from the US Department of Home Affairs in March to discuss the project. Despite skepticism from some scientists, interior secretary Doug Burgham praised the project as a remarkable advancement in science.

Vincent Lynch, a biologist at the University of Buffalo, emphasized that these reconstructed dire wolves cannot fully replicate the ecological functions they once performed.

Source: www.nbcnews.com

New research suggests early mammals possessed dark, dim greyish brown fur

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Fur colours, which serve many functions, are essential for the evolution of mammal behavior, physiology and habitat preferences. However, little is known about the colour of Mesozoic mammals that co-evolved with dinosaurs. In a new study, scientists from China, Belgium, the Netherlands, the UK and the US used the dataset Melanosome (Melanin-Containing Organelle) We quantitatively measured the morphology and quantitatively measured hair colours of 116 live mammals to reconstruct the colours of six Mesozoic mammals, including the species Yuhalamiidan mammals that were not previously described.

Reconstructing the life of Shenshou Luian extinct squirrel-like euhalamidian species from the Jurassic region of central China. Image credit: Tamuranobu, http://spinops.blogspot.com.

From communication to camouflage, animal colour plays an important role in many behavioral ecological functions.

Some animals exhibit distinct and vivid arrangements like birds, but mammalian fur is generally limited to muted tones due to their dependence on the single pigment melanin.

Mammals lack palettes, but have evolved a diverse and distinctive coat pattern.

However, due to lack of data on pigmentation in extinct mammals, the evolutionary history of hairy colour is not well understood.

Recent studies have shown that melanosomes, which cause pigmentation, can be preserved in fossilized specimens.

A similar technique has successfully reconstructed the colours of dinosaurs, but despite well-preserved fur specimens, it has not been widely applied to fossil mammals.

In the new study, Dr. Ruoshuang Li, a colleague of the Chinese University of Earth Sciences and colleague, analyzed melanosomes in 116 living mammals and created a predictive model to reconstruct the hairy colour based on melanosome morphology.

The authors applied the model to six Mesozoic mammalian forms of fossilized melanosomes, including the newly described euhalamyidan species that lived 158.5 million years ago (Late Jurassic Epoch).

The authors found that the fur of these early mammals was primarily and uniformly dark in colour, with no stripes and spots that adorn many modern mammals.

This suggests that despite evolutionary differences in phylogenetics and ecology, the early mammalian melanin colored systems remained little different.

This is in stark contrast to the diverse melanosome structures found in feathered dinosaurs, early birds and pterosaurs, indicating a distinct evolutionary pattern of mammalian colour.

“The typical modern nocturne mammals, such as the dark, uniformly dull fur found in these species – moles, mice, rats and nocturne bats, support the previous hypothesis that early mammals are also largely nocturne and colored for camouflage,” the researchers said.

“In addition, the high melanin content of the fur may have been beneficial in providing mechanical strength for thermoregulation and protection.”

“Following the Cretaceous – Fat extinction event, mammals rapidly diversified into niches previously occupied by dinosaurs, leading to more diverse melanosome structures and new perage colour strategies that are more suited to a more diverse environment.”

Survey results It was published in the journal today Science.

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rushuang li et al. 2025. Mesozoic mammalian forms illuminate the origin of the colour of the hair. Science 387 (6739): 1193-1198; doi: 10.1126/science.ads9734

Source: www.sci.news

Preventing Freezing with Fur: A Guide

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Ice crystals cannot stick to the fur of the polar bear

Asifphotographer1/Shatte Rstock

Anyone who saw a wildlife documentary did not stick to the skin on polar bears.

This has been known for a long time by the Arctic indigenous residents who have used this fur, but is now attracting attention and studying by scientists. Bodyl holst Norwegian University in Bergen and her colleagues indicate that the ice resistance of the arakugen's fur is not the characteristics of the fur itself, but the natural oil secreted by the hair.

Holst is a physicist who studies the surface characteristics. She started when she saw a polar bear on her fur, because she was very well insulated while watching a TV quiz program, she was barely insulated. In other words, the temperature of the outward fur is under freezing, but Horst was realized, but she had never seen a wildlife film coated with ice.

“And why did I don't think freezing is a problem? Why does ice do not accumulate in fur under these circumstances?” She says.

After all, this is a problem for many other land mammals in cold environments, from cows in Musuku to growing beards. Holst asked a researcher at Polar Research Institute in Norwegian why he knows why the arco is on ice. I didn't do anything, but I decided to investigate together.

Horst and her colleagues obtained a sample of polar bears from the Norwegian Subarbird and compared them with human hair. They discovered that the power needed to remove ice from the polar bears was one -quarter of the human hair. In other words, bears can easily shake the ice.

Washing polar bears removes ice resistance, suggesting that oil -based coating on the hair is the key to its characteristics. This substance, known as sebum, is secreted by glands connected to the hair.

There are no substances called squalene, which are commonly found in sebum, especially in aquatic mammals, especially in aquatic mammals. It also contains some abnormal fatty acids. These may be unique to polar bears, but we can't be convinced of it because there are few research on animal sebum composition.

Unlike the methods used in other fur, the Arctic people, such as Inuit, have traditionally prepared polar bears by storing sebum. They also use fur in a way to use ice resistance.

For example, the Greenland Inuit Hunter is known to have stopped sticking to ice by placing a small part of the portrogle fur under the legs of a stool used by the hunter. They also tied the pacifier's fur into the boot sole while stalking animals to avoid the noise made of ice -covered surface.

The Holst team is currently investigating potential applications, such as creating an environment -friendly ski wax, which is currently used to prevent ice, which is used for long -term full -term fluorocarbon compounds.

Hair wax based on polar bears can help people who work in a cold environment. “I didn't think about the application, but it should definitely work,” says Horst. “I think you just gave me a new idea.”

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Source: www.newscientist.com

Stay Warm in the Coldest Weather with a Polar Bear Fur Sweater

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Polar bear fur keeps animals warm even in arctic temperatures

Torsten Milse/Robersarding/Alamy

Fibers said to mimic polar bear fur may one day be used in the next generation of spacesuits, military uniforms and clothing for extremely cold environments.

Under the guidance of developers at China’s Zhejiang University, this man-made fiber has already been made into sweaters and is claimed to be as warm as down feathers, the best-known natural insulator. It’s just a small part of that warmth. thickness.

The researchers make claims about the sweater’s strength and stretch in their paper, but not everyone is convinced they’ve presented enough data to back them up.

HaobaiPolar bear fur consists of a highly porous core and a dense shell, team members said. “The porous structure traps large amounts of air to block heat transfer, and the dense shell provides the hair’s mechanical strength,” he says.

Man-made fibers, on the other hand, are composed of “aerogels,” materials with low density, high porosity, and high air content (more than 90 percent by volume) encased in a rubberized exterior.

In addition to being warm, the researchers tested the fabric for practicality by subjecting it to 10,000 stretching cycles and reported no loss of structure. It has an elasticity of up to 1,600 percent and is strong enough that a single fiber can lift a mass of 500 grams.

Sweaters knitted with this fiber are “about one-fifth as thick as down for the same warmth, and are easier to wash and dye,” the researchers wrote in their paper. “Such fibers have excellent insulation and multifunctionality, and have great potential in areas such as military uniforms and spacesuits used in extremely cold environments.”

lisa lake According to a research team at Australia’s University of Technology Sydney, people have long been interested in how polar bear fur keeps the animals warm in such frigid temperatures, and researchers are looking to create a synthetic It appears they have found a way to mimic that property using materials.

but christopher hullen Researchers from Australia’s Deakin University also question the claims based on the limited data presented.

There are also many animals with hollow fur similar to polar bears, such as beavers, camels, and the Australian green possum. One of the biggest benefits of polar bear fur is not its structure, but the transparency of the fibers, which reduces heat radiation.

“It’s a nice idea, but does it really mimic polar bear fur?” says Hulen. “Probably not.”

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Source: www.newscientist.com