Resilience as a function of strain for the 100:0 and 30:70 PEG/PDMS hydrogels, PAAm, gelatin, and resilin. The resilience was calculated from cyclic stress-strain curves in tension, and the error bars represent one standard deviation from three cycles for each measured strain. Zero resilience represents that fracture occurs at the corresponding strain. Resilin shows a high resilience at both small and large strains. (Data taken from M. Jensen and T. Weis-Fogh, Phil. Trans. Roy. Soc. Lond. B Biol. Sci., 1962 and C. Elvin et al. Nature, 2005)