It is all around us. Every day in our lives we are in contact with it. In fact, we are made from it: ancient stardust. All the atoms around us have witnessed the most violent explosions in the universe. Their journeys through space are the longest, roughest and loneliest voyages imaginable. The hydrogen in the water we drink is the lightest of all the elements, and it dates back to the Big Bang at the beginning of the universe. Heavier elements, like the iron in our blood and the oxygen in the air we breathe, were forged in stars and…
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