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Category: biological – Page 15

Reining In a Chaotic Fluid

Fluid flows mimicking biological flows can be controlled in the lab using a feedback system, which could be useful in robotics and other technologies.

Ordinary fluids can flow when driven by pressure or gravity, but biological fluids, such as those inside cells, generate complex flows through internal sources of chemical energy. Flows of such “active fluids” could be extremely useful in robotics and other areas of engineering, but controlling them remains difficult. Now researchers have demonstrated a method of control that maintains a constant fluid speed despite changing conditions [1]. They hope that the approach can be used to stabilize active-matter flows in future technologies.

Life depends on biochemical processes that respond to many situations while maintaining fixed chemical conditions despite external and internal disruptions. Inspired by this impressive stability, researchers have been developing analogous artificial systems by assembling active fluids from key biochemical components akin to those inside cells. For example, they have created fluids that can generate their own bulk contractions or undergo spontaneous flows. Although these rudimentary designs mimic some features of living matter, researchers have so far failed to demonstrate techniques that keep properties such as fluid flow speeds stable over time.

A third path to explain consciousness: Biological computationalism

Right now, the debate about consciousness often feels frozen between two entrenched positions. On one side sits computational functionalism, which treats cognition as something you can fully explain in terms of abstract information processing: get the right functional organization (regardless of the material it runs on) and you get consciousness.

On the other hand is biological naturalism, which insists that consciousness is inseparable from the distinctive properties of living brains and bodies: biology isn’t just a vehicle for cognition, it is part of what cognition is. Each camp captures something important, but the stalemate suggests that something is missing from the picture.

In our new paper, we argue for a third path: biological computationalism. The idea is deliberately provocative but, we think, clarifying. Our core claim is that the traditional computational paradigm is broken or at least badly mismatched to how real brains operate.

On biological and artificial consciousness: A case for biological computationalism

The rapid advances in the capabilities of Large Language Models (LLMs) have galvanised public and scientific debates over whether artificial systems might one day be conscious. Prevailing optimism is often grounded in computational functionalism: the assumption that consciousness is determined solely by the right pattern of information processing, independent of the physical substrate. Opposing this, biological naturalism insists that conscious experience is fundamentally dependent on the concrete physical processes of living systems. Despite the centrality of these positions to the artificial consciousness debate, there is currently no coherent framework that explains how biological computation differs from digital computation, and why this difference might matter for consciousness.

Living cells may generate electricity from motion

Cells may generate their own electrical signals through microscopic membrane motions. Researchers show that active molecular processes can create voltage spikes similar to those used by neurons. These signals could help drive ion transport and explain key biological functions. The work may also guide the design of intelligent, bio-inspired materials.

A jolt to the system: Biophysicists uncover new electrical transmission in cells

Many biological processes are regulated by electricity—from nerve impulses to heartbeats to the movement of molecules in and out of cells.

A study by Scripps Research scientists reveals a previously unknown potential regulator of this bioelectricity: droplet-like structures called condensates. Condensates are better known for their role in compartmentalizing the cell, but this study shows they can also act as tiny biological batteries that charge the cell membrane from within.

The team showed that when electrically charged condensates collide with cell membranes, they change the cell membrane’s voltage—which influences the amount of electrical charge flowing across the membrane—at the point of contact.

Shortest light pulse ever created captures ultrafast electron dynamics

Electrons determine everything: how chemical reactions unfold, how materials conduct electricity, how biological molecules transfer energy, and how quantum technologies operate. But electron dynamics happens on attosecond timescales—far too fast for conventional measurement tools.

Researchers have now generated a 19.2-attosecond soft X-ray pulse, which effectively creates a camera capable of capturing these elusive dynamics in real time with unprecedented detail, enabling the observation of processes never observed before. Dr. Fernando Ardana-Lamas, Dr. Seth L. Cousin, Juliette Lignieres, and ICREA Prof. Jens Biegert, at ICFO, has published this new record in Ultrafast Science. At just 19.2 attoseconds long, it is the shortest and brightest soft X-ray pulse ever produced, giving rise to the fastest “camera” in existence.

Flashes of light in the soft X-ray spectral range provide fingerprinting identification, allowing scientists to track how electrons reorganize around specific atoms during reactions or phase transitions. Generating an isolated pulse this short, required innovations in high-harmonic generation, advanced laser engineering, and attosecond metrology. Together, these developments allow researchers to observe electron dynamics, which define material properties, at their natural timescales.

The mind-bending reality of quantum mechanics — with Jim Al Khalili

Jim Al-Khalili explores emerging technologies powering the future of quantum, and looks at how we got here.

This Discourse was recorded at the Ri on 7 November 2025, in partnership with the Institute of Physics.

Watch the Q&A session for this talk here (exclusively for our Science Supporter members):
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Physicist and renowned broadcaster Jim Al-Khalili takes a look back at a century of quantum mechanics, the strangest yet most successful theory in all of science, and how it has shaped our world. He also looks forward to the exciting new world of Quantum 2.0 and how a deeper understanding of such counterintuitive concepts as quantum superposition and quantum entanglement is leading to the development of entirely new technologies, from quantum computers and quantum sensors to quantum cryptography and the quantum internet.

The United Nations has proclaimed 2025 as the International Year of Quantum Science and Technology, to celebrate the centenary of quantum mechanics and the revolutionary work of the likes of Werner Heisenberg and Erwin Schrödinger. Together with the Institute of Physics, join us to celebrate the culmination of the International Year of Quantum at the penultimate Discourse of our Discover200 year.

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