[3] He wrote several books, including States of Matter (1975) (reprinted in a Dover paperback edition) and Feynman’s Lost Lecture (1996).
In the 1980s he was the director and host of The Mechanical Universe, an educational television series on physics that was adapted for high school use and translated into many other languages.
[4] In his later age, while continuing to teach and conduct research in experimental condensed matter physics, he turned his attention to issues related to science and society.
In articles and speeches, he addressed conduct and misconduct in science,[5] and issues related to fossil fuels and the climate of Planet Earth.
He was a founding member of the board of directors of the California Council on Science and Technology.