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Category: biological

Humans and artificial neural networks exhibit some similar patterns during learning

Past psychology and behavioral science studies have identified various ways in which people’s acquisition of new knowledge can be disrupted. One of these, known as interference, occurs when humans are learning new information and this makes it harder for them to correctly recall knowledge that they had acquired earlier.

Interestingly, a similar tendency was also observed in artificial neural networks (ANNs), computational models inspired by biological neurons and the connections between them. In ANNs, interference can manifest as so-called catastrophic forgetting, a process via which models “unlearn” specific skills or information after they are trained on a new task.

In some other instances, knowledge acquired in the past can instead help humans or ANNs to learn how to complete a new task. This phenomenon, known as “transfer,” entails the application of existing knowledge of skills to a novel task or problem.

Key biological marker into why young people self-harm uncovered

As many as one in six teenagers have self-harmed at some point in their lives. As well as being an indicator of emotional pain, self-harm is also the best-known predictor of death by suicide—yet researchers know little about the emotional and biological factors that lead to it.

A new study published in Nature Mental Health, led by Professor Rory O’Connor from the University of Glasgow helps to uncover the biological mechanisms behind why young people self-harm.

Expanding on his research into the psychological factors associated with self-harm, Professor O’Connor’s latest findings reveal that young people with a history of self-harm present a particular biological skin response to electrical activity—a physiological marker associated with difficulties in generating and managing emotions.

Why Do We Have a Consciousness?

What does it mean that we have consciousness — and why does nature care that we do? In a remarkable new convergence of philosophy, psychology, and comparative neuroscience, researchers at Ruhr University Bochum argue that consciousness is not a mysterious luxury, but a powerful evolutionary adaptation.

According to their analysis, conscious experience first emerged as a mechanism of basic arousal — a primordial alarm system to protect living organisms from immediate danger. ([RUB Newsportal][1]) As evolution proceeded, consciousness evolved further: general alertness enabled organisms to filter through overwhelming flows of sensory data, focus selectively, and detect complex correlations — a capacity indispensable for learning, planning, and survival in a dynamic world.

Finally, in some lineages including our own, a third layer arose: reflexive, self-consciousness. This allows us not only to perceive the world, but to perceive ourselves — our bodies, thoughts, sensations — across time. With it comes memory, foresight, self-awareness, and the ability to integrate personal history into projects and social lives.

What is especially striking: these researchers show that consciousness need not depend on a “human-style” cortex. Studies of birds — whose brain architecture is very different from mammals — reveal comparable functional capacities: sensory awareness, integrated information processing, and even rudimentary forms of self-perception. ([RUB Newsportal][1]) This suggests that consciousness, far from being a human special-case, may be a widespread evolutionary solution — one that can arise in diverse biological substrates when the right functional constraints are met.

In this light, consciousness emerges not as an ineffable mystery or a metaphysical afterthought, but as a natural phenomenon with concrete functions: for feeling, for alertness, for learning, for self-representation. Understanding it may not only tell us who we are — but also why it ever made sense for life to become conscious.

Press Release: Ruhr University Bochum

Continue reading “Why Do We Have a Consciousness?” | >

Biology Breakthrough: Scientists Discover First New Plant Tissue in 160 Years — and It Supercharges Crop Yields

A research group led by Dr. Ryushiro Kasahara has discovered a new plant tissue essential for seed formation, which will be named in his honor. A research team at Nagoya University in Japan has identified a previously unknown plant tissue that plays a crucial role in forming seeds. This marks the

Artificial membranes mimic life-like dynamics through catalytic chemical reactions

Using catalytic chemistry, researchers at Institute of Science Tokyo have achieved dynamic control of artificial membranes, enabling life-like membrane behavior. The work is published in the Journal of the American Chemical Society.

By employing an artificial metalloenzyme that performs a ring-closing metathesis reaction, the team induced the disappearance of phase-separated domains as well as membrane division in artificial membranes, imitating the dynamic behavior of natural biological membranes. This transformative research marks a milestone in synthetic cell technologies, paving the way for innovative therapeutic breakthroughs.

X-ray imaging captures the brain’s intricate connections

An international team of researchers led by the Francis Crick Institute, working with the Paul Scherrer Institute, has developed a new imaging protocol to capture mouse brain cell connections in precise detail. In work published in Nature Methods, they combined the use of X-rays with radiation-resistant materials sourced from the aerospace industry.

The images acquired using this technique allowed the team to see how nerve cells connect in the mouse brain, without needing to thinly slice biological tissue samples.

Volume electron microscopy (volume EM) has been the gold standard for imaging how nerve cells connect as ‘“circuitry” inside the brain. It has paved the way for scientists to create maps called connectomes, of entire brains, first in fruit fly larvae and then the adult fruit fly. This imaging involves cutting 10s of nm thin slices (tens of thousands per mm of tissue), imaging each slice and then building the images back into their 3D structure.

New deep-learning tool can tell if salmon is wild or farmed

A paper published in Biology Methods and Protocols, finds that it is now possible to distinguish wild from farmed salmon using deep learning, potentially greatly improving strategies for environmental protection. The paper is titled “Identifying escaped farmed salmon from fish scales using deep learning.”

Norway is home to the largest remaining wild populations of wild salmon and is also one of the largest producers of farmed salmon. Atlantic salmon abundance in Norway has declined by over 50% since the 1980s and is now at historically low levels. Escaped farmed salmon are an important reason for this decline.

Norway produces over 1.5 million metric tons of farmed Atlantic salmon annually. Each year, however, approximately 300,000 farmed salmon escape into the wild.

The Future of Humanity — What Will We Become?

From cyborgs to hive minds and civilizations of pure thought, we trace the possible futures of our species through the next trillion tomorrows.

Checkout Scav: https://go.nebula.tv/scav?ref=isaacar… Watch my exclusive video Autonomous Space Industry: https://nebula.tv/videos/isaacarthur–… Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall… Visit our Website: http://www.isaacarthur.net Join Nebula: https://go.nebula.tv/isaacarthur Support us on Patreon: / isaacarthur Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Facebook Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord Credits: The First Interstellar Colony Humanity’s Leap Beyond Sol Written, Produced & Narrated by: Isaac Arthur Editor: Keith Oxenrider Select imagery/video supplied by Getty Images Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone Chapters 0:00 Intro 0:15 The Road Ahead 2:24 What Do We Mean by “Human,” “Transhuman,” and “Posthuman”? 7:22 Life Extension – The Oldest Dream 10:33 Intelligence Beyond Biology – AI and Human Integration 14:19 Enhancing the Body and Mind 17:00 Civilizations of the Augmented 19:31 Scavenger Hunt 20:51 Strange Posthuman Pathways 23:11 Outward Migration – Stars and Timelines 25:00 Risks, Fears, and Pushback 26:27 Humanity on Cosmic Timescales 27:43 The Expanding Story.
Watch my exclusive video Autonomous Space Industry: https://nebula.tv/videos/isaacarthur–…
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur.

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall…

Visit our Website: http://www.isaacarthur.net.
Join Nebula: https://go.nebula.tv/isaacarthur.
Support us on Patreon: / isaacarthur.
Support us on Subscribestar: https://www.subscribestar.com/isaac-a…
Facebook Group: / 1583992725237264
Reddit: / isaacarthur.
Twitter: / isaac_a_arthur on Twitter and RT our future content.
SFIA Discord Server: / discord.
Credits:
The First Interstellar Colony Humanity’s Leap Beyond Sol.
Written, Produced & Narrated by: Isaac Arthur.
Editor: Keith Oxenrider.
Select imagery/video supplied by Getty Images.
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone.

Chapters.
0:00 Intro.
0:15 The Road Ahead.
2:24 What Do We Mean by “Human,” “Transhuman,” and “Posthuman”?
7:22 Life Extension – The Oldest Dream.
10:33 Intelligence Beyond Biology – AI and Human Integration.
14:19 Enhancing the Body and Mind.
17:00 Civilizations of the Augmented.
19:31 Scavenger Hunt.
20:51 Strange Posthuman Pathways.
23:11 Outward Migration – Stars and Timelines.
25:00 Risks, Fears, and Pushback.
26:27 Humanity on Cosmic Timescales.
27:43 The Expanding Story

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