some University scientists suggest a ' clump ' of dark matter . It was found to lag behind the galaxy it was associated with . This suggests dark matter particles may self - interact and slow down . It suggests dark matter may not be as oblivious to our surroundings as we thought .
Durham University scientists studied a 'clump ' of dark matter . It was found to lag behind the galaxy it was associated with . This suggests dark matter particles can self-interact and slow down . It means dark matter may not be as oblivious to our universe as we thought .