Origins

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About 13.8 billion years ago the universe was born, with space and time coming into being in the same instant. By the time the universe was 1 second old, the four forces in nature had acquired their present characteristics, elementary particles had obtained their mass, and particles constituting the nuclei of atoms were created. The nuclei of light elements, hydrogen and helium, were formed within the first 10 minutes of the birth of the universe with the first stable atoms coming to existenc