Femtoscopy of pp and Pb-Pb collisions with the ALICE experiment at the LHC

Femtoscopy is unique among all analysis techniques utilized in subatomic collision experiments as it directly addresses the space-time structure of the evolving system at the femtometer scale. We report on the results of two-particle Bose-Einstein correlation analyses in $pp$ and Pb-Pb collisions at $\sqrt{s}=7$~TeV and $\sqrt{s_{NN}}=2.76$~TeV, respectively, recorded by the ALICE experiment at the LHC. We discuss femtoscopic correlations for pions, kaons, and protons as a function of event multiplicity and total pair momentum.