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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“In business be as able as you can, but do not be cunning; cunning is the dark sanctuary of incapacity.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
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—Mark Twain [Samuel Langhorne Clemens] (1835–1910)