Side views of the capsule during its migration at each time at non-dimensional frequency being 0.02 for capillary number being and 0.05. Credit: Journal of Fluid Mechanics (2025). DOI: 10.1017/jfm ...

Fukuoka, Japan—As you read this sentence, trillions of cells are moving around in your body. From the red blood cells being pumped by your heart, to the immune cells racing across your lymphatic ...