Milky Way's 'Ageless' Silicon Suggests Galaxy Is Efficient At Mixing Things Up

The universe as we see it today is populated with the end results of a series of violent cataclysms — the birth and death of innumerable stars.
Each explosion seeded the cosmos with elements, which, in turn, became the raw materials for the next generation of stars. When these stars exploded into supernovae, they spread much heavier elements through space, and so on and so forth until heavy elements like oxygen, carbon and silicon were created.