Mystery of Secrets (1982)

In this infinite space, we currently know of only one planet where life exists. We know of only one history of civilization. And we know of only one type of intelligence—that of humans on Earth. Since time immemorial, the question of whether there is anyone else out there in the boundless reaches of space has remained a mystery. The film features scientists involved in the search for extraterrestrial intelligence, as well as renowned writers Arkady Strugatsky and Chingiz Aitmatov.