Our origins are intertwined with the stars that formed billions of years ago from "summary" of The Cosmic Connection by Carl Sagan
It is a remarkable fact that the atoms of our bodies are traceable to the stars that manufactured them in their crucibles long ago. These stars, many of them billions of years older than our sun, went through their life cycles, burning hydrogen and helium, synthesizing heavier elements in their cores, and eventually exploding in spectacular supernova events that scattered these new elements across the cosmos. The iron in our blood, the calcium in our bones, the carbon in our cells - all of these were forged in the nuclear furnaces of ancient stars. As the debris from these stellar explosions mingled with other interstellar material, new stars and planets began to form, including our own solar system. We are truly made of stardust, products of a vast cosmic evolution that spans billions o...
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