3 ms·

Study suggests dark matter may have collisional properties after all

• pavel_lishin 2y ago
  > these findings provide an unambiguous signature of a dark matter behavior that exhibits collisional properties in a very energetic high-redshift cluster collision. ooh, what if dark matter _used_ to be much more self-interacting, and now isn't? iirc, "high-redshift" means it's very far away from us, and thus what we're seeing is pretty old...
• mnky9800n 2y ago
  Why is there no dark matter here?
  • clipsy 2y ago
    Why do you think you’d notice if there was?
    • mnky9800n 2y ago
      i would assume physicists interested in dark matter would go looking for it either by trying to create it in the lab or digging it out of the ground or something.