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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“He said “Next time can I bring my friend?”
And I thought “Does he mean friend?”
And I thought “Yes he does mean friend.”
Which was quite bold in those days.
It was the Dark Ages. Men and men.
And they could still put you in prison for it.
And did, dear.”
—Alan Bennett (b. 1934)
“When you gonna get married, Marty? You should be ashamed of yourself. All your brothers and sisters, younger than you, they get married and got the children. I meet your mother in the produce store. She say to me “Eh, you know a nice girl for my boy Marty?” What’s the matter with you? That’s no way!”
—Paddy Chayefsky (1923–1981)