Conversation so far:
Who is Andrei Sakharov?
He was a Russian nuclear physicist, dissident, Nobel laureate, and activist for disarmament, peace and human rights
What happened with Andrei Sakharov in the 70's?
In 1970 Sakharov was among the three founding members of the Committee on Human Rights in the USSR along with Valery Chalidze and Andrei Tverdokhlebov.
What year did Andrei Sakharov return to fundamental science?
After 1965 Sakharov returned to fundamental science and began working on particle physics and physical cosmology.

Question: Did you find anything interesting?
Self-contained rewrite: Did you find anything interesting about Andrei Sakharov in the 70's?