- - Mysterious and more murky substance?
- - *Inferred cosmic substance (Russian)
- - hypothetical cosmic stuff
- - gloomy count finds theoretical stuff
- - Most of the universe, hypothetically
- - Hypothetical nonluminous stuff in space
- - A large proportion of the mass of the universe
- - Astronomers can't directly detect it
- - It's made up of WIMPs (Weakly Interacting Massive Particles)
- - Debate topic that leads to grim arguments?
- - Evil affair — stuff we can't see
- - universal material that has no light side?
- - Much of the universe not seen to be important after nightfall
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