Assertion: dark matter | /r/HasProperty | new type of particle
Facets:
value: with ordinary matter
type: OTHER
value: with themselves
type: OTHER
Source sentences:
text: Most researchers think dark matter is composed of a new type of particle, one that interacts very weakly at best with all the known forces of the universe save gravity.
text: Specifically, physicists have suggested that dark matter is composed of new kinds of particles that have very weak interactions—not just with ordinary matter but also with themselves.
text: Another possibility is that dark matter is composed of some new type of particle—one that researchers are now trying to detect in laboratories here on Earth (see The Big Bang).