Before revision: We perform a bidimensional Stokes experiment in an active cellular material: we force a monolayer of Madin-Darby Canine Kidney (MDCK) epithelial cells to migrate around a circular obstacle within a long and narrow channel, involving  cell shape changes and neighbour rearrangements.
After revision: We perform a bidimensional Stokes experiment in an active cellular material: an autonomously migrating monolayer of Madin-Darby Canine Kidney (MDCK) epithelial cells to migrate around a circular obstacle within a long and narrow channel, involving cell shape changes and neighbour rearrangements.