Assertion: dark matter | /r/HasProperty | a form of matter
Facets:
Source sentences:
text: Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3.
text: Dark matter is any form of matter that does not emit, scatter or reflect light and other electromagnetic wave.
text: Dark matter is a form of matter that neither emits nor absorbs light.