Cosmic strings are linear topological defects that may have been produced during symmetry-breaking phase transitions in the very early Universe. In an expanding Universe the existence of causally separate regions prevents such symmetries from being broken uniformly. with a network of cosmic string inevitably forming as a result. To faithfully generate observables of such processes req... https://www.chiggate.com/eeboo-memory-matching-game-animal-pre-school-supply/