Resumen de Dark Matter Drops a Clue.
The article looks at dark matter. Particular focus is given to astronomical observations in which dark matter surrounding four colliding galaxies moved more slowly than other particles, suggesting that the dark matter particles were interacting with one another. According to astronomer Richard Massey and colleagues, who published a study in the "Monthly Notice of the Royal Astronomical Society," these interactions may have occurred through a non-gravitational force affecting only dark matter.
