How do scientists know that dark matter exists?
A. They assume that anything invisible has to...
How do scientists know that dark matter exists?
A. They assume that anything invisible has to be dark.
B. Something has to be there to form superclusters.
C. The Redshifts give the dark matter away.
D. They observe gravitational lensing bending the light of other objects in space.
Answers: 2
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