85% of all matter in the universe is invisible. We can't touch it, see it, or detect it directly — but without dark matter, galaxies would fly apart and we wouldn't exist.We explore galaxy rotation curves, gravitational lensing, the cosmic microwave background, and the leading candidates for what dark matter actually is.🔔 Subscribe for weekly deep dives into science and space.#DarkMatter #Space #Cosmology #Physics #Universe