The concept of Swiss Cheese Universe was first invented by Einstein and Straus in 1945.[3] Swiss Cheese model has been used extensively to model inhomogeneities in the Universe. For an example, effects of large scale inhomogeneities (such as superclusters) on the observed anisotropy of the temperatures of cosmic microwave background radiation (CMB) was investigated by Rees and Sciama in 1968[4] using Swiss cheese model (the so-called Rees-Sciama effect).