Potential signs of 'interacting' dark matter suggest it is not completely dark after all
Astronomers believe they might have observed the first potential signs of dark matter interacting with a force other than gravity.
Image: Hubble stares into the crammed center of Messier 22
This image shows the center of the globular cluster Messier 22, also known as M22, as observed by the NASA/ESA Hubble Space Telescope. Globular clusters are spherical collections of densely packed stars, ...