You're entitled to say, if you're so smart, why don't you tell me what that dark matter is? And I'll have to confess I don't know.— Jim Peebles
The most terrific Jim Peebles quotes that are glad to read
I think I'd be depressed if everything were nearly all known, but I don't feel any danger of that happening.
It is an embarrassment that the dominant forms of matter in the universe remain hypothetical.