From a single injection that restores hearing to an AI system that thinks 100 times more efficiently, this week’s science stories are full of surprises. We also visit Mars, peer inside the ageing brain, watch ancient carbon spill from melting permafrost, and discover how sugarcane might save your teeth.

1. One Injection Reverses Deafness — Gene Therapy Restores Hearing in Weeks

A gene therapy trial has restored hearing in all ten patients born with a genetic form of deafness, some within just weeks of treatment. The patients, aged 1 to 24, all carry mutations in the OTOF gene, which is essential for transmitting sound signals from the inner ear to the brain. Researchers at the Karolinska Institutet, working with hospitals across China, used an engineered virus to deliver a working copy of the gene via a single injection into the inner ear. Most patients recovered some hearing within a month, with all showing marked improvement after six months. One seven-year-old participant nearly fully regained her hearing, enabling conversations just four months after treatment. The results, published in Nature Medicine, represent a major step towards treating genetic deafness without hearing aids or cochlear implants.

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Source: Karolinska Institutet

2. AI That Thinks Like a Human — and Uses 100x Less Energy

Researchers at Tufts University have developed a new approach to artificial intelligence that slashes energy consumption by up to 100 times while actually improving accuracy. The technique, called neuro-symbolic AI, combines standard neural networks with human-like logical reasoning — breaking problems into steps and categories rather than relying on brute-force pattern matching. In tests using the classic Tower of Hanoi puzzle, the system achieved a 95% success rate compared to just 34% for a standard AI model. Training took only 34 minutes instead of more than a day and a half, consuming just 1% of the energy. The research, led by Professor Matthias Scheutz, could help address one of the biggest criticisms of modern AI: its enormous power consumption. Data centres running AI systems already use vast amounts of electricity, and this approach suggests a path towards much more sustainable computing.

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Source: Tufts Now

3. Ancient Martian Sandstorm Frozen in Stone — Curiosity Finds 3.5-Billion-Year-Old Ripple Marks

NASA’s Curiosity rover has uncovered the first direct physical evidence of an ancient Martian sandstorm, preserved as ripple marks in sedimentary rock inside Gale Crater. The formations, known as supercritical climbing wind ripples, are exceptionally rare and only form under intense, fast-moving winds carrying large volumes of sand. Lead author Steven Banham, a planetary geologist at Imperial College London, described the discovery as “serendipitous” — the team spotted the unusual features in a routine black-and-white panorama taken at the end of a drive. The findings, published in Geology, suggest Mars once had an atmosphere far denser than today’s, capable of driving powerful winds and potentially supporting surface water. This reinforces the picture of early Mars as a much more Earth-like world than the cold, barren planet we see now.

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Source: Science (AAAS)

4. Scientists Identify the Protein That Ages Your Brain — and How to Stop It

Researchers at UCSF have identified a single protein, called FTL1 (Ferritin Light Chain 1), that appears to drive cognitive decline in ageing brains. By studying the hippocampus — the brain’s memory centre — in mice, the team found that FTL1 was the only protein that consistently differed between old and young animals. Older mice had higher levels, along with fewer connections between brain cells and poorer memory. The breakthrough came when researchers reduced FTL1 levels in older mice: connections between neurons increased, and performance on memory tests improved significantly. The protein appears to act as a metabolic brake, slowing energy production inside brain cells. When the team treated affected cells with a metabolism-boosting compound, the negative effects were prevented. Published in Nature Aging, the research opens a promising new avenue for tackling age-related cognitive decline and potentially conditions like Alzheimer’s disease.

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Source: UC San Francisco

5. A Wisconsin-Sized Chunk of Permafrost Is Thawing — and Flooding Rivers with Ancient Carbon

A sweeping 44-year study of northern Alaska has revealed that thawing permafrost is releasing vast quantities of ancient carbon into Arctic rivers. Led by geoscientist Michael Rawlins at the University of Massachusetts Amherst, the research analysed high-resolution data at one-kilometre grid resolution across the region and found that runoff is increasing, rivers are carrying more dissolved carbon, and the thawing season is stretching further into autumn. This carbon — frozen underground for thousands of years — eventually reaches the Arctic Ocean, where some converts to carbon dioxide, intensifying global warming. The Arctic already receives a disproportionate share of the world’s river-borne carbon, with more than 275 million tonnes released as CO₂ annually. Published in Global Biogeochemical Cycles, the study paints a concerning picture of a feedback loop: warming thaws permafrost, which releases carbon, which drives more warming.

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Source: UMass Amherst

6. Artificial Saliva Made from Sugarcane Could Protect Teeth from Decay

Scientists have developed an artificial saliva using a lab-modified sugarcane protein that can protect teeth from acid and bacteria. The key ingredient, a protein called CANECPI-5, binds directly to tooth enamel and forms a protective shield against the acids that cause decay. Early tests show it works even better when combined with fluoride and xylitol, significantly reducing damage. The innovation could be especially life-changing for head and neck cancer patients, who often lose saliva production after radiotherapy. Without saliva’s natural protective role, their teeth become highly vulnerable to rapid decay. The protein was originally identified during the Sugarcane Genome Project by researchers at UFSCar in Brazil, who discovered that sugarcane cystatins have potent inhibitory activity against enzymes linked to tooth damage. Published in the Journal of Dentistry, the research could lead to a new generation of mouthwash products for both cancer patients and the general public.

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Source: Medical Xpress

That’s your science roundup for the week of 8 April 2026! From restoring hearing with a single injection to discovering ancient Martian weather, it’s been another extraordinary week for science. Got a favourite story? Let us know in the comments, and we’ll see you next week!

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