The Big Bang theory is essential for understanding dark matter because the early universe was incredibly smooth, yet it evolved into the "clumpy" universe of galaxies we see today. Only additional gravity from dark matter can explain this rapid formation.

The Big Bang theory is essential for understanding dark matter because the early universe was incredibly smooth, yet it evolved into the "clumpy" universe of galaxies we see today. Only additional gravity from dark matter can explain this rapid formation. Matter is categorized as baryonic (normal atoms) or non-baryonic. Based on Big Bang nucleosynthesis, there is not enough baryonic matter to account for the universe's gravity, requiring a new kind of particle. Albert Bosmaused radio astronomy to confirm that galaxy rotation curves remain flat even further out in hydrogen gas clouds. Early candidates like neutrinos were ruled out because they are "hot" (fast-moving) and would prevent small-scale clumping. Consequently, scientists shifted focus toward Cold Dark Matter (CDM), which consists of slower, more massive particles that fit the observed evolution of the universe. (3/8)