'Good heavens!  Astronomer Clyde Tombaugh discovers Pluto'
1930s
NAME THE DECADE: Good heavens!  Astronomer Clyde Tombaugh discovers Pluto
Good heavens!  Astronomer Clyde Tombaugh discovers Pluto
Good heavens!  Astronomer Clyde Tombaugh discovers Pluto
NAME THE DECADE
1930s
NAME THE DECADE