Why do some people experience steeper cognitive decline with age than others? This study links part of that variance to the brain’s myelin-forming cells.

Using longitudinal cognitive data, postmortem white-matter analysis, single-nucleus RNA sequencing, and a mouse model, the authors find that worse cognitive trajectories associate with smaller myelinated axon diameters, thicker myelin, and an accumulation of oligodendrocytes that downregulate the NRF2 pathway. The pathology is not simple myelin loss. It points toward dysfunctional excess myelination and impaired oxidative-stress responses in oligodendrocytes.

Sudden cardiac death remains difficult to predict. The current clinical standard — reduced left ventricular ejection fraction (LVEF) — misses most at-risk patients and leads to many unnecessary defibrillator implants.

Researchers used deep learning on a large Swedish dataset of routine ECGs linked to death records and discovered a previously unknown ECG biomarker: a subtle slurred terminal R wave in lead aVL. This pattern is associated with higher risk of sudden cardiac death, likely linked to myocardial fibrosis.

Google-led multi-agent AI system that acts like a full data-science team. It processes 9k+ participants and millions of hours of wearable signals (HR, sleep, steps, etc.) to discover clinically useful biomarkers.

The Iterative Loop (core engine): Profile data + ground in literature, Parallel statistical + ML exploration, Iterative refinement — GapChecker & Critic agents repeatedly test, critique, and strengthen candidates, Adversarial validation (Critic vs Defender).