Lina R. Nih (Brain Health) and Seungman Park (Mechanical Engineering) have co-authored an article entitled “Cellular Viscous Properties in Senescence: An Emerging Biophysical Perspective and Potential Biomarker,” published in Ageing Research Reviews. This article explores changes in cellular viscosity during aging and their potential use as a biomarker of cellular senescence, with implications for understanding brain aging and neurological diseases.