We provide a range of supporting data, sorted in three high-level folders. 1. Experimental setup (information regarding the construction of our experimental setup). 2. Experimental data (example videos, summary spreadsheet of all experiments, and data sets used to generate the figures). 3. Code (various codes used for the processing of raw videos, for obtaining the Young modulus E, for the numerical solution of the full diffusion equation, and for plotting the processed data). For more details about the contents of these folders, please refer to the READ ME.pdf.