Scientific Breakthroughs of the Week — September 26, 2026

🧬 Life Sciences & Medicine

• A multicancer blood test did not reduce late-stage diagnoses in a trial – In the randomised NHS-Galleri trial, adding the Galleri blood test to usual care did not lower the rate of stage III or IV diagnoses across 12 prespecified cancers after three annual screening rounds, with an incidence rate ratio of 1.03. The trial enrolled 142,250 people aged 50 to 77 in England; half had their blood tested for tumour DNA signals, while the other half had samples stored untested. The full results appeared in the New England Journal of Medicine on September 22 from a team led by Peter Sasieni of Queen Mary University of London, with performance data in a companion Nature Medicine paper. The stage IV rate ratio of 0.86 has a confidence interval reaching 1.00, the test caught 27 to 37 percent of all cancers per round, and the trial was funded by its maker, Grail.
• An amoeba from a Californian hot stream divides at 63 degrees – Researchers isolated an amoeba, named Incendiamoeba cascadensis, that completes cell division at 63 degrees Celsius and stays motile at 64, above the roughly 60-degree ceiling previously recorded for any eukaryote. They cultured it from a geothermal stream in Lassen Volcanic National Park and compared its genes and gene activity at different temperatures with those of amoebae living in mild conditions. The study was published in Cell on September 22 by a team led from Syracuse University with the US Joint Genome Institute and the University of California, Berkeley. The record rests on a single species grown in the laboratory, and the protein features linked to heat tolerance were inferred from sequence analysis rather than tested directly.
• A 1,494-donor brain atlas maps shared signatures of eight disorders – An atlas of more than 6.3 million cell nuclei from the prefrontal cortex identified gene-expression changes shared across eight brain disorders, and closer overlap among Alzheimer’s, Parkinson’s, Lewy body disease and vascular dementia. The team sequenced the RNA of individual nuclei from post-mortem tissue of 1,494 donors, including people without any diagnosis and people with schizophrenia or bipolar disorder. It appeared in Nature on September 23 with two companion papers from the PsychAD consortium led by Panos Roussos at the Icahn School of Medicine at Mount Sinai. The samples come from one brain region at death, so the data show association with disease rather than cause, and the proposed drug targets remain untested.

🔭 Physics, Space & Astronomy

• ATLAS and CMS combine their searches for Higgs boson pairs – The two largest experiments at CERN’s Large Hadron Collider pooled their searches for events producing two Higgs bosons at once, measuring a rate 0.8 times the Standard Model prediction with an uncertainty of about plus 0.9 or minus 0.7. Pair production is sensitive to how strongly the Higgs boson couples to itself, a quantity that sets the shape of the Higgs potential and is so far only loosely constrained. The combination of 2015 to 2018 data was published in Physical Review Letters on September 25 by the ATLAS and CMS collaborations, after a preprint in February. The signal reaches only 1.1 standard deviations, far short of an observation, and the self-coupling is allowed anywhere between minus 0.71 and 6.1 times its predicted value.
• Ultra-clean graphene hosts both superconductivity and an unexplained anomalous metal – Physicists found pockets of gate settings in rhombohedral graphene where superconductivity reaches zero resistance and neighbouring ones where the resistance stops falling at a finite value, a state known as the anomalous metal. By tuning the stacked carbon sheets on a tungsten diselenide substrate with voltage and magnetic fields, they produced a sharp boundary between the two behaviours at millikelvin temperatures. The results were published in Nature on September 23 by Matthew Yankowitz’s group at the University of Washington with the University of British Columbia and Oak Ridge National Laboratory. The anomalous metal has been seen in thin films for decades without an accepted theory, and this work narrows the explanations rather than supplying one.

🌍 Earth, Climate & Environment

• Outbreaks cluster where farms and people meet fragmented forest – An analysis of 58,319 outbreak records for 32 diseases found that risk is typically highest in mosaic landscapes where people and livestock live next to forests and fragmented ecosystems, especially for dengue, Lyme disease and other vector-borne infections. The authors tested 16 proposed social and environmental drivers while correcting for how reporting falls off with distance from clinics, which cut recorded outbreaks by a median of 32 percent per extra hour of travel. It was published in Nature on September 23 by a 31-author team led by Rory Gibb of University College London. Drivers such as deforestation and warming had inconsistent effects from one disease to the next, and the findings rest on outbreak records that remain shaped by surveillance gaps.
• Liming farmland has removed carbon in the Mississippi basin – Agricultural lime, crushed carbonate rock spread to counter soil acidity and usually booked as a carbon dioxide source, has acted as a net carbon sink across the Mississippi River Basin over the past century. Using records of lime application and river alkalinity since 1900, the team estimates that about 90 percent of the potential removal of roughly 0.44 billion tonnes of carbon dioxide has been realised, with a lag of decades. The paper was published in Nature on September 23 by Noah Planavsky and colleagues at Yale University. The result applies to one basin, depends on treating human-made acidity inputs as the true source of emissions, and includes an initial emissions pulse before removal begins.

⚗️ Chemistry, Materials & Engineering

• A four-legged robot ran a full marathon on one battery charge – The KAIST quadruped RAIBO2 finished a 42-kilometre road marathon in 4 hours, 19 minutes and 52 seconds without recharging, with more than three times the range per charge of existing quadrupeds. The engineers cut losses across the whole machine at once, pairing lighter mechanics with a low-resistance motor circuit and a locomotion controller tuned to dissipate less energy. The design was published in Nature on September 23 by Jemin Hwangbo’s laboratory at KAIST in Daejeon. The run took place in November 2024 on asphalt roads with gentle slopes, and the robot’s range over rough terrain or with a payload was not demonstrated.
• Prussian blue scaffold steadies perovskite solar cells for five months – A framework of Prussian blue, the iron cyanide pigment, used as a template for perovskite films raised cell efficiency to 26.9 percent, with 26.2 percent independently certified. The scaffold guides the crystals to grow in one orientation and chemically neutralises metallic lead and iodine defects that degrade cells in use. The work appeared in Science on September 24 from a team at Xiamen University and Jinan University. Efficiency fell to a certified 22.9 percent on 30-centimetre submodules, and five months of outdoor testing is short against the decades expected of silicon panels.

📌 Also Notable

• Mammalian cells store ring-shaped sulfur that limits oxidative damage – Cyclo-octasulfur accumulates to millimolar levels in mouse and human cells and suppresses ferroptosis, a form of cell death driven by lipid oxidation, according to a Science paper published on September 24 by Tohoku University and the Max Planck Institute for Polymer Research, with the therapeutic test so far limited to a mouse model of osteoarthritis.
• Young orangutans learn their diet mostly by watching others – Across just under 7,000 recorded learning bouts during wild orangutans’ eight years of dependency, social learning was five times more frequent than solo learning and linked to broader diets at independence, researchers at the Max Planck Institute of Animal Behavior reported in Science on September 24.
• Dog brains track consonants in speech as human brains do – Electroencephalography of 20 pet dogs and 20 adults showed stronger tracking of word patterns built on consonants than on vowels in both species, a small study from Eötvös Loránd University in Budapest published in Science on September 24.
• NASA advances the PRIMA far-infrared telescope toward a 2033 launch – NASA said on September 24 that PRIMA, a far-infrared observatory led by the Jet Propulsion Laboratory to study how planets, stars and black holes form, will move into development with a cost cap of 1.2 billion dollars excluding launch.

Science review generated on September 26, 2026.