In astrophysics self-interacting dark matter is a hypothetical form of dark matter consisting of particles with strong self-interactions. This type of dark matter was postulated to resolve a number of conflicts between observations and simulations on the galactic scale and smaller. Self-interacting dark matter has also been postulated as an explanation for the DAMA annual modulation signal.
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Tears in mine eyes and sorrow at my heart.
If this be love, to live a living death,
Then do I love and draw this weary breath.”
—Samuel Daniel (1562–1619)
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