1950s

The 1950s marked a time when the human race first became aware of hostile aliens.

Superboy was active in Smallville at this time.

Years

 * 1950
 * 1951
 * 1952
 * 1953
 * 1954
 * 1955
 * 1956
 * 1957
 * 1958
 * 1959