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Archive for the ‘biological’ category

Nov 5, 2024

Stanford researchers develop molecule that forces cancer cells to kill themselves

Posted by in categories: bioengineering, biological, biotech/medical

The researchers’ recently published study describes a way to re-activate apoptosis in mutated cells, which would amount to forcing cancer to self-destruct through a bioengineered, bonding molecule.

Gerald Crabtree, one of the study’s authors and a professor of development biology, said he had the idea while hiking through Kings Mountain, California, during the pandemic period. The new compound would have to bind two proteins which already exist in the cancerous cells, turning apoptosis back on and making the cancer kill itself.

“We essentially want to have the same kind of specificity that can eliminate 60 billion cells with no bystanders,” Crabtree said, so that no cell gets destroyed if it isn’t the proper target of this new killing mechanism. The two proteins in question are known as BCL6, an oncogene which suppresses apoptosis-promoting genes in the B-cell lymphoma, and CDK9, an enzyme that catalyzes gene activation instead.

Nov 4, 2024

Robert Sapolsky: “The Brain, Determinism, and Cultural Implications” | The Great Simplification #88

Posted by in categories: biological, education, evolution, health, neuroscience, quantum physics

On this episode, neuroscientist and author Robert Sapolsky joins Nate to discuss the structure of the human brain and its implication on behavior and our ability to change. Dr. Sapolsky also unpacks how the innate quality of a biological organism shaped by evolution and the surrounding environment — meaning all animals, including humans — leads him to believe that there is no such thing as free will, at least how we think about it today. How do our past and present hormone levels, hunger, stress, and more affect the way we make decisions? What implications does this have in a future headed towards lower energy and resource availability? How can our species manage the mismatch of our evolutionary biology with our modern day challenges — and navigate through a ‘determined’ future?

About Robert Sapolsky:

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Nov 2, 2024

The Ghost In The Machine

Posted by in categories: biological, Ray Kurzweil, robotics/AI

There have always been ghosts in the machine. Random segments of code, that have grouped together to form unexpected protocols. Unanticipated, these free radicals engender questions of free will, creativity, and even the nature of what we might call the soul. Why is it that when some robots are left in darkness, they will seek out the light? Why is it that when robots are stored in an empty space, they will group together, rather than stand alone? How do we explain this behavior? Random segments of code? Or is it something more? When does a perceptual schematic become consciousness? When does a difference engine become the search for truth? When does a personality simulation become the bitter mote… of a soul?” – Dr. Alfred Lanning, I, Robot.

What is Consciousness? Some Neuroscientists would claim that consciousness is nothing more then a bi-product of the brain and how it is designed. With how the human brain has evolved over the past several thousand years it could be claimed that what you think of as “you” is nothing more than a collection of neural pathways interacting together. Your identity has been theorized as a random collection of synapses and biological processes which, according to futurists such as Ray Kurzweil would make it very easy to ‘copy’ and upload your identity to an avatar like body once your biological self has ceased to function. Are we nothing more than just an arbitrary collection of cells with a false sense of importance and self worth? I’ll leave that up to you to decide.

I believe that the human species has a certain drive built in, almost a natural instinct in which we are born to explore and discover the unknown. I believe this reason is why we have a wide variety of fictional and non fictional scientific topics to explore and learn something from. Our very nature encourages us to explore a wide variety of topics some of which may appear as fringe ideas. Those which border on the unusual are more often reserved to the realms of Science Fiction until we reach a point on a conscious level to where we are able to objectively look on it. This is a reason I would say Science Fiction is so popular for us; it allows for the exploration of new territory without having the burden of confronting it within our daily existence.

Nov 1, 2024

Research in Context: Can we slow aging?

Posted by in categories: biological, life extension

Researchers are making progress in understanding the biology of aging and learning ways it might be slowed down or even reversed.

Nov 1, 2024

New Insights into how Mars became Uninhabitable

Posted by in categories: biological, climatology, robotics/AI, space

NASA’s Curiosity rover, currently exploring Gale crater on Mars, is providing new details about how the ancient Martian climate went from potentially suitable for life – with evidence for widespread liquid water on the surface – to a surface that is inhospitable to terrestrial life as we know it.

Although the surface of Mars is frigid and hostile to life today, NASA’s robotic explorers at Mars are searching for clues as to whether it could have supported life in the distant past. Researchers used instruments on board Curiosity to measure the isotopic composition of carbon-rich minerals (carbonates) found in Gale crater and discovered new insights into how the Red Planet’s ancient climate transformed.

“The isotope values of these carbonates point toward extreme amounts of evaporation, suggesting that these carbonates likely formed in a climate that could only support transient liquid water,” said David Burtt of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and lead author of a paper describing this research published October 7 in the Proceedings of the National Academy of Sciences. “Our samples are not consistent with an ancient environment with life (biosphere) on the surface of Mars, although this does not rule out the possibility of an underground biosphere or a surface biosphere that began and ended before these carbonates formed.”

Nov 1, 2024

A radical theory of consciousness | AI researcher Joscha Bach

Posted by in categories: biological, robotics/AI

Joscha Bach puts forward his radical theory of cyber animism.

Can the natural world be understood in terms of software agents?

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Nov 1, 2024

Wearable ultrasound tech for long-term muscle monitoring expands applications for human-machine interfaces

Posted by in categories: biological, cyborgs, neuroscience, wearables

A key challenge in the effort to link brain activity with behavior is that brain activity, measured by functional magnetic resonance imaging (fMRI), for instance, is extraordinarily complex. That complexity can make it difficult to find recurring activity patterns across different people or within individuals.

In a new study, Yale researchers were able to take fMRI data, reduce its complexity, and in doing so, uncover stable patterns of activity shared across more than 300 different people. The findings, researchers say, are a promising step forward in uncovering biomarkers for psychiatric disorders.

The study was published Sept. 24 in the journal PLOS Biology.

Oct 31, 2024

#115 Alexander Rosenberg: Theory of Mind, History, Mental Illusions, and Nihilism

Posted by in categories: biological, ethics, neuroscience, robotics/AI

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Oct 30, 2024

Enlisting Microbes to Break Down ‘Forever Chemicals’

Posted by in categories: biological, chemistry

Bacteria can degrade particularly tough PFAS varieties.

Oct 30, 2024

The Hidden Math Behind All Living Systems

Posted by in categories: biological, mathematics, neuroscience, robotics/AI

Dr. Sanjeev Namjoshi, a machine learning engineer who recently submitted a book on Active Inference to MIT Press, discusses the theoretical foundations and practical applications of Active Inference, the Free Energy Principle (FEP), and Bayesian mechanics. He explains how these frameworks describe how biological and artificial systems maintain stability by minimizing uncertainty about their environment.

Namjoshi traces the evolution of these fields from early 2000s neuroscience research to current developments, highlighting how Active Inference provides a unified framework for perception and action through variational free energy minimization. He contrasts this with traditional machine learning approaches, emphasizing Active Inference’s natural capacity for exploration and curiosity through epistemic value.

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