Something wonderful happened about 13.8 billion years ago. Everything in the universe was created in an instant as an infinitesimally small point of energy: the Big Bang. We know that this event happened, as the universe is constantly expanding and galaxies are moving away from us. The more we peer into the past, the smaller it gets – that’s how we know it must have once been infinitesimally small, and that there must have been a beginning.

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