[4] He attended the University of California at Berkeley, graduating Phi Beta Kappa, and earning a Ph.D. in physics.

It was Einstein who urged him to teach ordinary people about the peaceful uses of atomic power, and that led to Posin writing the book I Have Been to the Village.

[1] From 1967 until 1996 Dr. Posin taught Astronomy, Earth Science and Physics at San Francisco State University.

However, his wife adopted the Baháʼí Faith, and he expressed desire “to go where she’s going.”[10] His book I Have Been to the Village[11] includes a quote by Einstein, who wrote: "Dr. Dan Q. Posin's book bears eloquent witness to the sincere and self-sacrificing way in which the ablest among the scientists try to fulfill their duty toward the community."

Posin authored over 30 books, including Dr. Posin's Giants: Men of Science,[12] Out of This World,[13] Mendeleyev: The Story of a Great Scientist,[14][15] Exploring and Understanding Our Solar System, What is a star (The What is it series), What is Chemistry, What is Electronic Communication, Science in the Age of Space, Chemistry for the Space Age, Find Out!