https://en.wikipedia.org/wiki/Dark_matter#Observational_evidence https://en.wikipedia.org/wiki/Dark_matter#Observational_evid... Short version: * Distribution

https://en.wikipedia.org/wiki/Dark_matter#Observational_evidence https://en.wikipedia.org/wiki/Dark_matter#Observational_evid... Short version: * Distribution of stellar velocities in elliptical galaxies implies DM * Mass distribution in clusters of galaxies implies DM * Gravitational Lensing observations imply DM * CMS anisotropy power spectrum matches DM * Structure formation in early universe appears to require DM * Bullet cluster observations imply DM * Flatness of the universe implies DM plus some other statistical measures which also imply DM.