Invisible Cosmic Mystery Particles Are Playing a Giant Game of Hide-and-Seek!

Our universe is filled with a mysterious, invisible glue called dark matter [stuff we cannot see but makes up most of space], and it might be much weirder than we ever thought! Exciting new ideas suggest it is actually made of two different particles that slowly drift apart, with heavy ones sinking to the middle of galaxies while light ones float to the edges. Who knew that the biggest secrets in space could be solved by cosmic particles playing their own game of tag?