Part 7/12:
The initial compositions shaped during the Big Bang, primarily hydrogen and helium, combine to establish nuclei for all greater elements. However, heavier elements crucial for life's evolution would emerge later, primarily within stars that would ignite the cosmic matter into stellar fusion, gradually enriching the universe.
This lent itself to the occurrence of dark ages within the universe—vital times when no new light sources existed until gravitational forces led to the formation of the first stars. This luminescence re-ionized hydrogen, allowing subsequent waves of light to traverse once dark voids.