Dark Matter Evidence

Dark matter's existence is the most compelling unsolved puzzle in modern cosmology. Vera Rubin and Kent Ford's 1970s galaxy rotation curve measurements revealed stars orbiting 50% faster than visible mass could account for, proving that approximately 27% of the universe consists of invisible dark matter. This discovery outperforms #2 (the Big Bang theory) in direct observational evidence for an unseen component, fundamentally changing our understanding of cosmic structure.