This is from a new book of essays by Weinberg. I haven't read it yet, but it got a great review in Physics Today, who called it "a delightful collection of essays for the general reader." They wrote, "Weinberg often hits the nail right on the head."
- Steven Weinberg, Third Thoughts; The Universe We Still Don't Know, Google Books: bit.ly/2Cyo5ax
PS: Interesting book cover. I wonder what it means. (Weinberg is now 85.)