The article presents the findings of a study by researcher Kinneret Keren at the Technion Institute of Technology in Israel and her colleagues regarding fluid flow in the lamellipodia of moving cells. As reported, Keren and her colleagues set out to study fluid flow in the lamellipodia of moving cells and found that by quantifying size-dependent distribution of inert probes, intracellular fluid flow in lamellipodium of fastly moving fish keratocytes can be measured.