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Archive for the ‘evolution’ category: Page 81

Sep 30, 2021

No Shame In Wanting To Look Younger — It Is Natural And You Might As Well Live Longer

Posted by in categories: biological, evolution, life extension

Like many other living organisms, humans are born, survive, compete for resources, reach maturity, reproduce, take care of their young, sometimes the young of their young, continuously decline, and die. Evolution needs us for just two purposes – adapt and reproduce. But, unlike other species, humans are very conscious of their fate. Humans are very much aware that after reaching peak performance they will eventually grow old and die. We are very conscious of our fate after reaching peak performance – loss of function, frailty, and eventual loss of everything we worked so hard to earn.

We observe our parents, and other elderly around them, attend funerals, and understand that eventually we will get into this state. We are also very contempt with that fate as evolution made sure that. The more ambitious of us are trying to advance science, the rest seek refuge in religion, some in philosophy, some in accumulation of wealth, and some see the continuation of ourselves in our children. But despite the many technological advances transpiring in the laboratories all over the world, there is nothing we can do at this point to escape aging. There are diets, exercises, sleep, and supplements, but these provide very marginal benefits. We do not see 120+ old yoga and diet practitioners or marathon runners around. But these simple habits do help look younger longer. And many people that have very harmful habits like smoking but still diet and exercise to look younger.

Sep 30, 2021

No News Here, Just a Beautiful Globular Cluster Captured by Hubble. That is all

Posted by in categories: evolution, space

Here’s some beauty for your timeline: a stunning and ancient globular cluster captured by the venerable Hubble Space Telescope. The telescope’s Wide Field Camera 3 and Advanced Camera for Surveys was used to take this picture of ESO 520–21 (also known as Palomar 6), which is located about 25,000 light years away from Earth. Scientists say this globular cluster is probably about 12.4 billion years old.

Globular clusters are collections of tightly bound stars orbiting galaxies. Astronomers consider them as natural laboratories which enablie studies on the evolution of stars and galaxies. In particular, globular clusters could help researchers better understand the formation history and evolution of early type galaxies, as the origin of GCs seems to be closely linked to periods of intense star formation.

ESO 520–21 lies close to the center of the Milky Way, and from our vantage point on Earth, is in the constellation Ophiuchus. It’s location near the celestial equator is where interstellar gas and dust absorb starlight, which make observations more challenging.

Sep 29, 2021

Self-replicating protocells created in lab may be life’s “missing link”

Posted by in categories: biological, chemistry, evolution

A possible explanation for life from nonliving material.


Exactly how life first emerged from non-living matter is one of the most enduring mysteries of science. In a new study, Japanese scientists have created self-replicating protocells in the lab, which they say could represent the “missing link” between chemistry and biology.

Primitive Earth was covered with a sludgy mix of chemicals, containing organic molecules that formed the precursors for vital biological components like proteins and amino acids. There are several different hypotheses for how and where life sprang out of this soup, but one of the first ideas was known as chemical evolution, which is what the new study investigated.

Continue reading “Self-replicating protocells created in lab may be life’s ‘missing link’” »

Sep 28, 2021

The nematode C. elegans senses airborne sound

Posted by in category: evolution

Hearing is thought to exist only in vertebrates and some arthropods, but not other animal phyla. Here, Xu and colleagues report that the earless nematode C. elegans senses airborne sound and engages in phonotaxis. Thus, hearing might have evolved multiple times independently in the animal kingdom, suggesting convergent evolution.

Sep 27, 2021

Dr Brian Keating, PhD — Into The Impossible — Chancellor’s Distinguished Professor of Physics — UCSD

Posted by in categories: cosmology, evolution, physics

Multiverse Cosmology, Nobel Laureates, Theories Of Everything, And Much More! — Dr. Brian Keating Ph.D., Chancellor’s Distinguished Professor of Physics, UC San Diego.


Dr. Brian Keating, Ph.D. (https://briankeating.com/) is Chancellor’s Distinguished Professor of Physics, at the Center for Astrophysics & Space Sciences (CASS), in the Department of Physics, at the University of California, San Diego (https://bkeating.physics.ucsd.edu/).

Continue reading “Dr Brian Keating, PhD — Into The Impossible — Chancellor’s Distinguished Professor of Physics — UCSD” »

Sep 26, 2021

Life-like cells are made of metal

Posted by in categories: biological, evolution, particle physics

Circa 2011 o,.o Foglet bodies around the corner sooner than we think 🤔


Could living things that evolved from metals be clunking about somewhere in the universe? Perhaps. In a lab in Glasgow, UK, one man is intent on proving that metal-based life is possible.

He has managed to build cell-like bubbles from giant metal-containing molecules and has given them some life-like properties. He now hopes to induce them to evolve into fully inorganic self-replicating entities.

Continue reading “Life-like cells are made of metal” »

Sep 25, 2021

In a gene tied to growth, scientists see glimmers of human history

Posted by in categories: biotech/medical, evolution, genetics, sex

“Our study points to sex-and environment-specific effects of a common genetic variant. In the mice, we observed that Ghrd3 leads to a ‘female-like’ expression pattern of dozens of genes in male livers under calorie restriction, which potentially leads to the observed size reduction,” Saitou says.

“Females, already smaller in size, may suffer from negative evolutionary consequences if they lose body weight. Thus, it is a reasonable and also very interesting hypothesis that a genetic variant that may affect response to nutritional stress has evolved in a sex-specific manner,” Mu says.


A new study delves into the evolution and function of the human growth hormone receptor gene, and asks what forces in humanity’s past may have driven changes to this vital piece of DNA.

Continue reading “In a gene tied to growth, scientists see glimmers of human history” »

Sep 22, 2021

Do Microbes Make Us Social?

Posted by in categories: biological, evolution, genetics, neuroscience

Microbes may have influenced the evolution of the social brain and behavior as a means to propagate their own genetic material.

—Cryan, Dinan, et al., November 2,019 Science.


In an effort to extend their territory, microbes may push us to socialize.

Sep 17, 2021

Directed evolution of a family of AAV capsid variants enabling potent muscle-directed gene delivery across species

Posted by in categories: bioengineering, biotech/medical, evolution, genetics

Progress.


Replacing or editing disease-causing mutations holds great promise for treating many human diseases. Yet, delivering therapeutic genetic modifiers to specific cells in vivo has been challenging, particularly in large, anatomically distributed tissues such as skeletal muscle. Here, we establish an in vivo strategy to evolve and stringently select capsid variants of adeno-associated viruses (AAVs) that enable potent delivery to desired tissues. Using this method, we identify a class of RGD motif-containing capsids that transduces muscle with superior efficiency and selectivity after intravenous injection in mice and non-human primates. We demonstrate substantially enhanced potency and therapeutic efficacy of these engineered vectors compared to naturally occurring AAV capsids in two mouse models of genetic muscle disease. The top capsid variants from our selection approach show conserved potency for delivery across a variety of inbred mouse strains, and in cynomolgus macaques and human primary myotubes, with transduction dependent on target cell expressed integrin heterodimers.

Sep 16, 2021

Fossils and ancient DNA paint a vibrant picture of human origins

Posted by in categories: biotech/medical, evolution, genetics, neuroscience

That fossil wasn’t enough to confirm Africa as our homeland. Since that discovery, paleoanthropologists have amassed many thousands of fossils, and the evidence over and over again has pointed to Africa as our place of origin. Genetic studies reinforce that story. African apes are indeed our closest living relatives, with chimpanzees more closely related to us than to gorillas. In fact, many scientists now include great apes in the hominid family, using the narrower term “hominin” to refer to humans and our extinct cousins.

In a field with a reputation for bitter feuds and rivalries, the notion of humankind’s African origins unifies human evolution researchers. “I think everybody agrees and understands that Africa was very pivotal in the evolution of our species,” says Charles Musiba, a paleoanthropologist at the University of Colorado Denver.

Paleoanthropologists have sketched a rough timeline of how that evolution played out. Sometime between 9 million and 6 million years ago, the first hominins evolved. Walking upright on two legs distinguished our ancestors from other apes; our ancestors also had smaller canine teeth, perhaps a sign of less aggression and a change in social interactions. Between about 3.5 million and 3 million years ago, humankind’s forerunners ventured beyond wooded areas. Africa was growing drier, and grasslands spread across the continent. Hominins were also crafting stone tools by this time. The human genus, Homo, arrived between 2.5 million and 2 million years ago, maybe earlier, with larger brains than their predecessors. By at least 2 million years ago, Homo members started traveling from Africa to Eurasia. By about 300,000 years ago, Homo sapiens, our species, emerged.

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