Assertion: dark matter | /r/HasProperty | controlling
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Astronomers believe that dark matter is a "cosmic glue" holding together rapidly spinning galaxies and controlling the rate at which the universe expands.
text: Because it so massively outweighs ordinary matter, dark matter is often said to be the controlling force that organizes large structures such as galaxies and galactic clusters.