St. Augustine concluded that an infinite source or prime mover created the universe exhihilo. He came up with a line of reasoning in his arguments from design. These arguments were based on the idea that the substance of the universe required a divine origin. Today scientists are studying the problem of creation. Science does not address the question of who created the universe.
Scientists have rules that they work by called conservation laws.
Some of these conservation laws are the conservation of momentum, energy, and charge. Science addresses the question of how the universe formed within the framework of possibilities allowed by these laws. According to current theory and experimental evidence these conservation laws always hold true. In more precise language, they are invariant with respect to time and location. The scientific principle of the conservation of energy simply restates the old idea that something cannot come from nothing.