What we do know, and what we can assert without further hesitation, is that he universe had a beginning. The universe continues to evolve. And yes, every one of our body's atoms is traceable to the big bang and to the thermonuclear furnaces within high-mass stars that exploded more than five billion years ago. We are stardust brought to life, then empowered by the universe to figure itself out - and we have only just begun. . Neil Degrasse Tyson
About This Quote

The universe has an end. It does not continue to expand forever into the future. The universe will eventually come to an end and we will all cease to exist. What we know and what we can assert is that the universe had a beginning and is continuing to evolve and grow throughout time.

The majority of what we do know is because of the existence of modern science. For instance, we know that there is a beginning to the universe because the first stars were formed as a result of thermonuclear reactions, which require tremendous amounts of energy. We also know that the universe continues to evolve as new stars are born and others die.

We know that every atom in our body was once part of a massive star that exploded billions of years ago.

Source: Astrophysics For People In A Hurry

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