Maurizio Morri – Science Blog

recent posts

about

  • Federated Learning and the Future of Distributed AI

    Most machine learning still follows a centralized model. Data is collected, sent to a server, and used to train large models in the cloud. But this approach runs into three problems at scale: privacy, bandwidth, and latency. Federated learning is emerging as an answer by moving training to the edge and keeping raw data local.

    In federated learning, devices such as phones or IoT sensors train small updates to a shared model using their own data. Only the weight updates are transmitted back to a central server, where they are aggregated into a global model. This design ensures that sensitive data never leaves the device, reducing privacy risks while still contributing to collective intelligence.

    The technical challenges are significant. Edge devices vary widely in compute power, network stability, and data distribution. Non-IID (independent and identically distributed) data makes convergence harder because each device sees a biased slice of the world. Communication efficiency is another hurdle: transmitting updates frequently can overwhelm networks, so methods like update compression and asynchronous aggregation are essential.

    Security also requires attention. Malicious devices can attempt model poisoning by sending corrupted updates. Defenses include anomaly detection, Byzantine-resilient aggregation rules, and secure multi-party computation to protect the integrity of contributions.

    Despite the challenges, federated learning is already in production. Google uses it for keyboard prediction on Android devices. Healthcare projects use it to analyze medical records across hospitals without centralizing sensitive data. Banks explore it to detect fraud collaboratively without exposing customer information.

    Federated learning is more than a technique, it is a shift in how we think about machine intelligence. Instead of pulling all data into one place, intelligence is grown collectively across a network of devices. In a world where privacy and efficiency matter as much as accuracy, this distributed approach may define the future of AI.

    References

    https://arxiv.org/abs/1602.05629

    https://federated.withgoogle.com/

    https://www.nature.com/articles/s42256-021-00359-2

  • Epigenetic Clocks and the Biology of Aging

    Aging has long been measured by the calendar, but biology rarely follows neat human timetables. In recent years researchers have turned to DNA methylation patterns as a new way to quantify age. These so-called epigenetic clocks are becoming one of the most powerful tools in biomedicine.

    The principle is straightforward. Chemical tags known as methyl groups attach to specific regions of DNA. The distribution of these tags shifts predictably over time. By examining thousands of methylation sites across the genome, scientists can build mathematical models that estimate biological age with surprising accuracy.

    What makes this approach transformative is the distinction between chronological and biological age. Two people may share the same birthday, yet their methylation patterns can reveal vastly different aging trajectories. Factors such as lifestyle, diet, exposure to toxins, and chronic disease leave measurable imprints on the epigenome. Epigenetic clocks therefore provide a real-time readout of how an individual is aging internally.

    The applications are broad. In clinical research, these clocks are being used to test whether anti-aging interventions truly slow biological time. In epidemiology, they are helping to identify populations at higher risk for age-related disease. Even forensic science is exploring methylation signatures to estimate the age of unidentified individuals.

    Challenges remain. Not all epigenetic clocks agree, and the link between methylation patterns and underlying mechanisms of aging is still debated. Yet the momentum is clear. With better models and larger datasets, epigenetic clocks are moving from experimental tools to practical biomarkers. They may soon become routine in assessing health, guiding therapy, and even shaping how we think about longevity itself.

    References
    https://www.nature.com/articles/s41576-019-0098-0
    https://www.science.org/doi/10.1126/science.aau3865
    https://www.cell.com/trends/genetics/fulltext/S0168-9525(21)00161-8

  • A New Look at How Cells Move

    In the last two weeks researchers at the CSIR Centre for Cellular and Molecular Biology in Hyderabad revealed a striking new insight into how our cells change shape and move in response to stress or infection. Cell movement has always been known to depend on actin filaments, the thin protein strands that push out the cell membrane and allow it to crawl forward. What was less clear was how these filaments start forming so quickly and in such a precise pattern.

    The team discovered that a protein called SPIN90 is the missing link. Working together with the Arp2/3 complex, SPIN90 initiates the very first actin filaments at a distinctive angle of about 150 degrees. That geometry is not random. It sets up a scaffold that branches rapidly, giving the cell the structure it needs to surge toward wounds, invading microbes, or other signals that demand a fast response.

    Using cryogenic electron microscopy the researchers were able to see this process unfold at near atomic detail. They captured SPIN90 guiding the first steps of filament growth and creating the conditions for an entire actin network to bloom almost instantly. The discovery helps explain how immune cells can chase pathogens so quickly, how tissues repair themselves after injury, and even how cancer cells sometimes manage to invade new environments.

    The implications are broad. If scientists can learn how to influence SPIN90’s activity they may eventually be able to control cell movement in therapeutic ways, slowing down invasive tumors or boosting the ability of immune cells to reach infection sites. At the same time the finding highlights just how much remains unknown in the everyday workings of our own cells. What turns SPIN90 on or off, how the angle of filament growth is controlled, and whether this mechanism changes across different cell types are questions that remain wide open.

    This discovery is a reminder that even the most fundamental processes in biology still hold surprises, and that with new imaging technologies we can see details of life that were invisible until now.

    Francis J, Pathri AK, Shyam KT, Sripada S, Mitra R, Narvaez-Ortiz HY, Eliyan KV, Nolen BJ, Chowdhury S. Activation of Arp2/3 complex by a SPIN90 dimer in linear actin-filament nucleation. Nature Structural & Molecular Biology. 2025 Sept 15. DOI: 10.1038/s41594-025-01673-8 Nature+1

    “CCMB scientists uncover how cells reshape to fight disease.” Times of India, reported Sep 16, 2025. The Times of India

    Liu T, Cao L, Mladenov M, Way M, Moores CA. Arp2/3-mediated bidirectional actin assembly by SPIN90 dimers in metazoans [preprint]. bioRxiv. 2025 Jan 31. DOI: 10.1101/2025.01.31.635869 BioRxiv+1

  • Scientists Discover Coral That Can Recover from Bleaching in Record Time

    Marine biologists working in the Great Barrier Reef have identified a previously unknown species of coral capable of recovering from bleaching events significantly faster than any other documented species. The research, published in Current Biology, details how this coral can rebuild its symbiotic relationship with algae in as little as two weeks.

    Most corals rely on microscopic algae called zooxanthellae for energy through photosynthesis. When ocean temperatures rise or other stressors occur, corals expel these algae, leading to the white, weakened appearance known as bleaching. Recovery, if it happens at all, usually takes months or even years.

    However, the newly discovered coral, provisionally named Acropora resurgens, appears to have evolved a more dynamic symbiotic system. Scientists observed that this coral recruits and reestablishes symbiosis with a wider variety of algal strains, giving it a rapid recovery edge.

    The coral was found in a relatively isolated part of the northern reef system, where water temperatures fluctuate more dramatically than in other regions. Researchers believe these conditions may have driven the evolution of this rapid-recovery trait.

    If this trait can be understood at a genetic level, it could have far-reaching implications for coral conservation and reef restoration. Some researchers are already considering ways to incorporate this resilience into coral breeding and replanting efforts aimed at protecting global reef ecosystems under climate pressure.

    This discovery adds to a growing body of evidence that nature may be evolving new defense mechanisms faster than previously thought, offering cautious optimism in the face of ongoing environmental challenges.

    Sources

    https://www.cell.com/current-biology/fulltext/S0960-9822(25)00476-9

    https://www.abc.net.au/news/2025-06-12/rapid-recovery-coral-great-barrier-reef-science/103264340

    https://www.gbrmpa.gov.au/news/2025/fast-healing-coral-hope-for-reef

  • Ancient Tree Rings Reveal Solar Storm That Outshone Modern Records

    A newly published study in Nature Geoscience has revealed that an intense solar storm struck Earth approximately 14,300 years ago, leaving a clear signature in ancient tree rings preserved in subfossil pines found in the French Alps. This prehistoric space weather event may have been ten times stronger than the most powerful solar storm recorded in modern times.

    The researchers analyzed annual growth layers in tree trunks and measured elevated levels of radiocarbon, a form of carbon created when high-energy particles from the Sun collide with Earth’s atmosphere. These particles create a spike in carbon‑14, which then becomes incorporated into growing trees. The levels found in this study point to an extreme solar proton event that likely lasted for several days.

    This discovery not only pushes back the earliest known record of a solar storm but also serves as a stark reminder of the potential vulnerability of modern technology. If a similar event occurred today, it could severely impact satellites, power grids, communication networks, and GPS systems across the globe.

    One of the most notable aspects of the finding is that the storm did not leave visible auroras or written records, yet its magnitude was locked into nature’s archive. The researchers suggest that such events may occur more frequently than previously thought, although their long timescales make prediction challenging.

    The study calls for renewed focus on understanding the frequency and impact of ancient solar storms to better prepare for future space weather threats. Tools such as ice core analysis and continued dendrochronological research could help extend the solar activity timeline further into the past.

    Sources

    https://www.nature.com/articles/s41561-024-01463-1

    https://www.bbc.com/news/science-environment-68963536

    https://www.eurekalert.org/news-releases/1042214

  • New Study Suggests Dolphins May Have a Vocabulary of Signature Sounds

    In a surprising twist on animal communication research, a new study published in Nature Communications suggests that dolphins may use a complex system of signature sounds akin to a spoken vocabulary. The research, led by marine biologists at the University of St Andrews and the Sarasota Dolphin Research Program, analyzed years of acoustic recordings from bottlenose dolphins off the Florida coast.

    Dolphins are already known to have individual signature whistles that function like names. However, this new study goes further, identifying consistent sound patterns that appear to represent specific behaviors, objects, or social interactions. Using machine learning and pattern recognition software, the team matched certain whistles with repeated contexts such as play, feeding, or the approach of a known individual.

    What makes the findings particularly exciting is that these sound clusters were used repeatedly across different pods and individuals, suggesting a shared acoustic code. While the researchers stop short of calling it a full-fledged language, they do argue that dolphins have developed a rudimentary form of symbolic communication.

    The study raises intriguing questions about the evolution of language in nonhuman species. Dolphins have brains that rival humans in size relative to body weight and have demonstrated high levels of problem-solving, self-awareness, and emotional intelligence.

    Beyond the scientific novelty, this research could improve efforts to protect dolphin populations. Understanding how these animals communicate can inform conservation strategies, particularly in noise-polluted environments where human activity may disrupt natural communication.

    Researchers plan to expand the study to other regions and species, as well as test interactive underwater devices that may one day allow for simple two-way communication between humans and dolphins.

    Sources

    https://www.nature.com/articles/s41467-025-21193-6

    https://www.st-andrews.ac.uk/news/archive/2025/title,1052130,en.php

    https://sarasotadolphin.org/dolphin-vocalizations-research-2025/

  • New Ocean Microbe Could Unlock Secrets of Earth’s Carbon Cycle

    Marine biologists have discovered a new species of ocean-dwelling microbe that may play a pivotal role in the planet’s carbon cycle. This tiny organism, found in the mesopelagic zone of the Pacific Ocean, appears to consume carbon in a highly efficient and previously undocumented way.

    The microbe belongs to a class of archaea and was identified during a deep-sea expedition led by the Monterey Bay Aquarium Research Institute (MBARI). Using autonomous sampling vehicles and high-throughput genetic sequencing, the team isolated the organism from water samples taken at depths between 500 and 1,000 meters. This region, often called the ocean’s twilight zone, is poorly understood but believed to be crucial in long-term carbon storage.

    What makes this new microbe exceptional is its ability to fix carbon not just through traditional photosynthesis or chemosynthesis, but via a hybrid metabolic pathway. According to the study published in Nature Microbiology, the organism utilizes both ammonia oxidation and dissolved organic matter to drive carbon assimilation. This dual process allows it to operate efficiently in low-light, low-nutrient conditions.

    The implications are significant. If this metabolic strategy is widespread among other deep-sea microbes, it may mean that the ocean has an even greater capacity for long-term carbon sequestration than previously estimated. This could impact climate models and inform geoengineering approaches aimed at mitigating atmospheric CO₂.

    Researchers are now working to culture the microbe in lab conditions to study its genome, protein structures, and potential biotechnological applications. There is also interest in understanding how widespread this microbial strategy might be in other parts of the world’s oceans.

    This discovery highlights the value of exploring Earth’s least known ecosystems. As scientists learn more about the microscopic life in the deep sea, they may uncover vital mechanisms that regulate climate and sustain marine biodiversity.

    Sources

    https://www.nature.com/articles/s41564-025-01567-3
    https://www.mbari.org/news/new-carbon-sequestering-microbe-2025/

  • New Insights Into Octopus Intelligence Challenge Human-Centric Views of Cognition

    A groundbreaking study published this week in the journal Current Biology sheds new light on the cognitive abilities of octopuses, offering compelling evidence that these cephalopods exhibit complex learning behaviors once thought to be exclusive to vertebrates.

    Conducted by researchers at the University of Naples Federico II and the Max Planck Institute for Brain Research, the study involved training common octopuses (Octopus vulgaris) to solve visual pattern tasks that required them to generalize concepts of sameness and difference. Not only did the animals learn to distinguish the patterns with surprising speed, but they also retained the learned rules across different contexts and sensory conditions.

    The researchers used a custom-designed tank with automated visual cues and reward delivery systems to eliminate human interference. Over multiple trials, the octopuses demonstrated the ability to apply abstract logic, a capacity rarely documented in invertebrates.

    These findings support the idea that advanced cognition can evolve in radically different nervous systems. Octopuses have a distributed brain with over 500 million neurons, many of which are located in their arms. Despite this unconventional architecture, they exhibit problem-solving, tool use, and even short- and long-term memory consolidation.

    Beyond theoretical interest, this research could inform the development of alternative models for neural computation and AI. If biological intelligence can arise in such a distinct form, it expands the framework for understanding consciousness and learning mechanisms.

    The study has also reignited ethical discussions around the treatment of octopuses in research and aquaculture. As their cognitive capacities become better understood, calls for improved welfare standards are growing louder.

    Sources

    https://www.cell.com/current-biology/fulltext/S0960-9822(24)00792-8

    https://www.sciencenews.org/article/octopus-abstract-learning-intelligence-cephalopod

  • Shark Skin Inspires New Antibacterial Surface Technology

    In a remarkable example of biomimicry, scientists have developed a new surface coating inspired by the structure of shark skin that significantly reduces bacterial growth. This innovation could have far-reaching implications for public health, particularly in hospitals and clinics where bacterial contamination poses ongoing challenges.

    The research, led by teams from the University of Nottingham and Sharklet Technologies, focuses on a micro-patterned surface that mimics the dermal denticles of shark skin. These tiny ridges naturally prevent biofilm formation by disrupting how bacteria adhere and grow. When applied to synthetic materials, the engineered surface reduced bacterial growth by up to 94 percent in lab tests.

    Unlike traditional antibacterial coatings that use chemical agents, this technology relies solely on physical structure. That means it does not encourage antibiotic resistance or rely on ongoing chemical reapplication. The surface can be applied to plastics, metals, and even textiles, making it versatile for use in medical devices, hospital beds, and other high-touch environments.

    Beyond healthcare, the shark skin-inspired surface could be useful in food processing, public transportation, and wearable technology. Its passive, non-toxic mechanism also makes it attractive for use in environments where frequent cleaning is difficult or expensive.

    The researchers are now partnering with industry stakeholders to develop scalable manufacturing methods and conduct field trials. If successful, this nature-inspired technology could play a pivotal role in the global effort to reduce healthcare-associated infections and promote safer public spaces.

    Sources

    https://www.sciencedaily.com/releases/2024/06/240605120118.htm

    https://www.nottingham.ac.uk/news/antibacterial-shark-skin-surface-coating

  • Glass Frog Transparency Offers Insights into Blood Cell Storage and Camouflage

    A recent study published in Science has revealed how the glass frog, a small amphibian native to Central and South America, achieves near-invisibility during rest by hiding nearly 90 percent of its red blood cells in its liver. This fascinating discovery sheds light on both biological camouflage and potential applications in medical science.

    The researchers used high-resolution ultrasound imaging and light microscopy to observe living glass frogs (Hyalinobatrachium fleischmanni) in their natural habitat. They found that when the frogs are active, their blood flows normally throughout their bodies. But when the frogs rest and need to blend into their leafy environments, the red blood cells disappear from circulation and are packed tightly into the liver, which becomes reflective and opaque.

    This process dramatically reduces the amount of red pigment visible in the body, making the frog almost entirely transparent apart from its bones and a few organs. The effect is not simply a matter of color change—it involves active biological control of circulatory patterns. The frogs manage to concentrate red blood cells without forming clots, a feat that challenges current understanding of clotting dynamics in vertebrates.

    The implications go beyond amphibian biology. Understanding how glass frogs avoid clotting while storing red blood cells may inspire new strategies for managing blood storage in humans. This could lead to medical advancements in areas like trauma care, blood banking, and circulatory disorders.

    Scientists believe this adaptation evolved as a survival mechanism to evade predators by becoming almost invisible against the green background of leaves. The research also highlights the importance of non-traditional model organisms in uncovering novel physiological mechanisms that have broad relevance.

    Sources

    https://www.science.org/doi/10.1126/science.abn0544

    https://www.nationalgeographic.com/animals/article/how-glass-frogs-hide-red-blood-cells-to-turn-transparent