On this day in movie history - Silent Running (1972):

Silent Running,

directed by Douglas Trumbull,

written by Deric Washburn, Michael Cimino and Steven Bochco,

was released in the United States on March 10, 1972.
Music by Peter Schickele.
Songs: Silent Running and Rejoice in the Sun performed by Joan Baez.

Cast:
Bruce Dern, Cliff Potts, Ron Rifkin, Jesse Vint, Mark Persons, Steven Brown, Cheryl Sparks, Larry Whisenhunt, Joseph Campanella, Roy Engel.