UW News
Vid Irsic
July 24, 2017
Dark matter is likely ‘cold,’ not ‘fuzzy,’ scientists report after new simulations
![the empty space between galaxies](https://uw-s3-cdn.s3.us-west-2.amazonaws.com/wp-content/uploads/sites/6/2017/07/04140257/CDM_image-TILE-150x150.jpg)
Scientists have used data from the intergalactic medium — the vast, largely empty space between galaxies — to narrow down what dark matter could be.