Sep 23, 2026 · Science & Research Daily Digest
Science, space, biomedicine, and climate research highlights compiled for Sep 23, 2026, with summaries, links, and brief commentary.
I. Space & Deep Space
1. ESA–JAXA Ramses planetary-defence spacecraft powered on for the first time (Planetary defence)
Summary:
On Sep 23, ESA reported that the prime contractor has powered on the ESA–JAXA Ramses planetary-defence spacecraft for the first time, moving the project from paper designs and unit tests into full-scale integrated system testing. Ramses must launch on a Japanese H-3 rocket in spring 2028 to rendezvous with near-Earth asteroid Apophis before its Friday 13 April 2029 Earth flyby. The two modules are due to be mated next spring at ESTEC in Noordwijk for thermal-vacuum and mission-simulation campaigns. Project manager Paolo Martino called the switch-on a new phase: the team now has a real spacecraft rather than simulations alone.
Links:
Commentary:
Power-on is a milestone, not a schedule cushion—the hard constraint remains under three and a half years from contract to launch before the Apophis window closes.
2. NASA chief: Artemis III about 90 days behind, pressuring dual 2028 landings (Human spaceflight)
Summary:
Mashable reported on Sep 23 that NASA Administrator Jared Isaacman told staff in a Sunday email that Artemis III is roughly three months behind schedule. A “best-case” summer 2027 launch could still leave two lunar-landing shots in 2028; otherwise NASA might get only one late-2028 attempt. NASA confirmed the email’s authenticity to the outlet. Isaacman said the agency is pressing suppliers on delayed valves and steering hardware and even fabricating some parts in-house. The announced crew remains Randy Bresnik, Andre Douglas, Frank Rubio, and ESA astronaut Luca Parmitano.
Links:
- Mashable — Artemis III delays could threaten landing on the moon in 2028
- NASA — Moon to Mars | Artemis Program
Commentary:
This is schedule candor, not cancellation—the dual-landing 2028 narrative survives only if the supply chain closes that 90-day gap in months, not years.
II. Biomedicine & Health
3. Roche/Ionis: sefaxersen Phase 3 interim hits IgAN proteinuria endpoint (Nephrology)
Summary:
On Sep 23, Roche said the Phase 3 IMAgINATION study of antisense sefaxersen in primary IgA nephropathy met its prespecified interim primary endpoint: in 459 adults at high risk of progression, randomized 1:1 to once-monthly subcutaneous drug or placebo, 24-hour urine protein-to-creatinine ratio (UPCR) improved with statistical and clinical significance at week 37. Safety matched prior data with no new signals. Exact effect sizes and p-values were not disclosed; Roche plans a medical-congress readout and regulator talks while the trial stays blinded through week-105 kidney-function endpoints. The drug inhibits complement factor B and is positioned as a self-injectable disease-modifying option.
Links:
- Roche — Positive interim data shows sefaxersen significantly reduces proteinuria in IgAN
- BioSpace — Roche-Ionis’ RNA therapy reduces kidney disease marker
Commentary:
Interim UPCR wins often open accelerated-approval talks—but dialysis- and transplant-relevant proof still sits at week-105 eGFR until the numbers are public.
4. Otsuka/Ionis: ulefnersen Phase 3 FUSION improves function and survival in FUS-ALS (Rare neurology)
Summary:
Otsuka and Ionis announced positive topline Phase 3 FUSION results for antisense ulefnersen in ALS caused by FUS mutations: in 73 patients, a joint-rank analysis of ALSFRS-R, time to death or permanent ventilation, and rescue showed a statistically significant benefit versus placebo at Day 505 (p=0.0005). Secondary endpoints including serum neurofilament light chain (NfL) and time to death, permanent ventilation, rescue, or progression-related withdrawal also favored the drug. The partners plan FDA and global regulator talks on expedited paths; detailed data will follow at a congress and in a peer-reviewed paper. BioSpace and others amplified the readout on Sep 23.
Links:
- Otsuka — Transformative Phase 3 FUSION Results for Ulefnersen in FUS-ALS
- BioSpace — Ionis-Otsuka offer improvement in function and survival for genetic ALS
Commentary:
First placebo-controlled Phase 3 win against a genetic FUS-ALS cause—small N and a narrow subtype leave open how far regulators will let labels travel beyond this niche.
5. Nature: bitopic kinase-inhibitor design yields PonatiLink-2 against resistant ABL1 (Oncology chemistry)
Summary:
A Sep 23 Nature paper lays out systematic bitopic kinase-inhibitor design—engaging two sites on one target via ligand choice, linkage vector, and linker length that tune cooperativity versus linker entropy. Using ABL1 and EGFR as models, the team addressed the BCR::ABL1 leukaemia tension between ponatinib’s resistance coverage and cardiovascular toxicity with PonatiLink-2: potency matching or beating ponatinib on resistance mutants, a wider in vitro and in vivo therapeutic window enabling higher dosing without apparent toxicity, and mouse superiority versus clinically relevant regimens (with dasatinib on wild-type disease; as monotherapy on ponatinib-resistant disease).
Links:
Commentary:
Selectivity-versus-potency moves from single-pocket wrestling to two-pocket engineering—translation still hinges on cardiac safety and real-world resistance spectra matching the mice.
6. PsychAD: 1,494-donor prefrontal single-cell atlas across eight brain disorders (Neuroscience)
Summary:
Reuters reported on Sep 23 that the PsychAD consortium published a suite of studies building a population-scale single-nucleus transcriptomic atlas of the human dorsolateral prefrontal cortex: more than 6.3 million nuclei from 1,494 donors aged infancy to 108, spanning Alzheimer’s, Parkinson’s, Lewy body disease, vascular dementia, schizophrenia, bipolar disorder and other conditions plus controls. Across nine papers, teams mapped cell-type trajectories, found strong shared signatures among Alzheimer’s, Lewy body, vascular dementia and Parkinson’s in neuronal development, synaptic signalling and vascular biology (including microglial pathways), and linked inherited risk to specific cell types and regulatory effects on more than 14,000 genes. A Nature News & Views the same day said the resource could reshape how scientists view brain ageing and disease.
Links:
- Devdiscourse / Reuters — Scientists map gene activity in brain's prefrontal cortex
- Nature — Single-cell atlas of transcriptomic vulnerability across brain disorders
- Nature News & Views — Vast cellular gene-expression atlas
Commentary:
This is a target map, not a therapy—shared neuro–immune–vascular signatures help prioritize interventions, but functional validation still gates the clinic.
7. Liège/Rockefeller: near-atomic structures of the trypanosomatid trans-spliceosome (Parasitology)
Summary:
University of Liège and Rockefeller University researchers report in Nature Communications on Sep 23 cryo-EM structures of the spliced-leader (SL) RNA trans-spliceosome from Leishmania tarentolae flanking the second catalytic step. The machine is essential for maturing essentially all trypanosomatid mRNAs yet had remained mechanistically opaque for nearly 40 years. The structures reveal core organization, RNA positioning, and parasite-specific proteins absent in humans while preserving fundamental spliceosomal chemistry—framing selective intervention points against sleeping sickness, Chagas disease and leishmaniasis.
Links:
- Nature Communications — Structural basis of step II SL RNA trans-splicing in trypanosomatids
- Phys.org — Snapshots reveal key molecular machine in tropical parasites
Commentary:
Human-absent parasite proteins are the drug-window story—structures now exist; druggable chemistry and in-vivo efficacy do not yet.
III. Climate & Environment
8. CAS-led study: land heatwaves arrive earlier and peak faster; season +~8.7 days/decade (Extremes)
Summary:
Wenfang Xu, Juxiu Liu (South China Botanical Garden, CAS), Wenping Yuan (Peking University) and colleagues report in Nature Climate Change on Sep 23 that from 1979–2023, global land heatwave onset advanced 3.29±0.12 days per decade, endings delayed 5.41±0.12 days per decade, and the heatwave season lengthened 8.71±0.17 days per decade—about two weeks earlier starts, ~24 days later ends and ~39 days longer seasons over 45 years. Trends toward earlier onset, later ending and longer seasons covered 72.0%, 79.6% and 92.1% of land, stronger in drylands; rapid-onset first heatwaves rose as a share of affected area in 2001–2023. Authors argue early-warning systems must track timing and onset speed, not only intensity and duration.
Links:
- Nature Climate Change — Earlier and faster heatwave onset on land under a warming climate
- Phys.org — Heat waves on land start earlier and develop faster
Commentary:
Heat risk expands from “how hot, how long” to “how early, how fast”—objectively shrinking prep time for public health and agriculture.
9. UN launches Global Grids Accelerator to unblock clean power in Africa and Southeast Asia (Energy transition)
Summary:
On Sep 23, UN Secretary-General António Guterres launched the Global Grids Accelerator on the sidelines of the UN Climate Summit in New York, aiming to turn national grid-expansion plans into investment-ready projects and match them with expertise and finance. Coverage notes renewable buildout far outpacing wires, driving curtailment; the IEA estimates more than 80 million kilometres of grids must be added or refurbished by 2040—roughly today’s entire global network—and annual grid investment needs to rise about 50% by 2030. In Vietnam, Thailand and Indonesia, about 50%–60% of renewable projects were cancelled or stalled in 2021–2025 partly for lack of grid capacity.
Links:
Commentary:
A summit “accelerator” can package and finance projects; it cannot compress 5–15-year permitting and build cycles unless capitals move permits and capital in the same year.
10. Northwestern-led team: sterically orthogonal passivation pushes perovskite cells to 27.4% (PV materials)
Summary:
Donghoon Shin, Bin Chen, Edward H. Sargent and collaborators at Northwestern (with Korean partners) report in Nature Chemistry on Sep 23 that bulky, chemically orthogonal Lewis acid–base pairs can co-passivate anionic and cationic perovskite surface defects without quenching each other in solution. Devices reached power-conversion efficiencies up to 27.4%, with a certified steady-state 25.8%. Conventional acid–base co-dosing forms inactive adducts; steric gating keeps the partners reactive toward surface sites but not toward each other, with spectroscopy supporting additive trap suppression.
Links:
Commentary:
Another lab efficiency crown—module area and outdoor lifetime remain the gates; orthogonal passivation that will not scale is just another high-PCE letter.
IV. Fundamental Research
11. Duke Quantum Center: trapped-ion simulator observes string-breaking dynamics (Quantum simulation)
Summary:
Christopher Monroe and colleagues at the Duke Quantum Center report in Nature Physics on Sep 23 observing string-breaking dynamics in a (1+1)-dimensional Z₂ lattice gauge theory on a programmable trapped-ion simulator—analogous to particle–antiparticle creation when a confining string snaps. Site-resolved laser control of effective magnetic fields emulates static charges and string tension: charges diffuse freely without tension but show localized coherent oscillations as tension rises; after a sudden tension quench, charge pairs appear near string ends and spread into the bulk, a pathway distinct from the conventional Schwinger mechanism. EurekAlert the same day framed the result as a step toward probing post–Big Bang matter questions on controllable quantum hardware.
Links:
- Nature Physics — String-breaking dynamics in a quantum simulator
- EurekAlert — Quantum device simulates matter popping into existence
Commentary:
Parking a toy gauge theory in an ion trap proves observability, not classical-supercomputer supremacy—scale and dimensionality are still the next walls.
12. Yanshan University team: open-framework boron allotrope Imma-B₆₀ is conductive and ~23% plastic (Materials chemistry)
Summary:
Feng Chen and colleagues report in Nature Chemistry on Sep 23 the synthesis of open-framework allotrope Imma-B₆₀ via high-pressure formation of a Na₄B₆₀ precursor followed by sodium degassing. B₁₂ icosahedra linked by triangular B₃ units through two- and three-centre σ bonds yield a <0.2 eV bandgap and conductivity of ~9×10² S m⁻¹—about seven orders of magnitude above β-boron—plus ~23% plastic strain under oriented uniaxial compression via dislocation-mediated slip rather than brittle fracture. The work challenges the “superhard, brittle, poorly conducting” stereotype of elemental boron and offers a precursor route to metastable allotropes.
Links:
Commentary:
A conductive, ductile elemental boron would rewrite lightweight conductor menus—if high-pressure degassing can ever leave the lab.
Today's Summary
- Space: Ramses powers on into integrated testing; Artemis III’s ~90-day slip puts dual 2028 landings under pressure.
- Biomedicine: sefaxersen and ulefnersen post Phase 3 RNA-therapy wins; bitopic kinase design and a trypanosomatid trans-spliceosome structure widen the target map.
- Brain and climate: PsychAD’s prefrontal single-cell atlas drops; land heatwaves are quantified as earlier, faster and longer-seasoned, while the UN elevates grid bottlenecks at the Climate Summit.
- Fundamentals: ion-trap string breaking and a plastic, highly conductive boron allotrope probe gauge dynamics and elemental limits.
Daily Framing:
Today in the science cycle was a “hardware power-on meets Phase 3 readout” day—planetary-defence electrification and Artemis candor landed alongside RNA nephrology/ALS positives and a rewritten heatwave clock.
This digest is compiled from real-time search results and is for reference only.