Comic Title: Wonder Woman #21
Publisher: DC (Wonder Woman Publishing Company, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Jan/Feb 1947
Approx. On Sale Date: November 27, 1946 Copyright Date November 25, 1946
Source: Library of Congress, Periodicals 1946-1947
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 48
Editor: Sheldon Mayer

Title: "The Mystery of the Atom World"
Pages: 36

Feature(s):
Wonder Woman (of Earth-2)

Writer: William Moulton Marston
Artist: Harry G. Peter

Reprinted In:
Wonder Woman:The Golden Age Omnibus Vol. 3 HC (2019)

Feature Character(s)

• Wonder Woman (last appearance in Sensation Comics #61; next appearance in Sensation Comics #62)

Supporting Character(s)

• Paula Von Gunther (last appearance in Sensation Comics #60; next appearance in Wonder Woman #22)
• Etta Candy (last appearance in Sensation Comics #61; next appearance in Sensation Comics #63)
• Holliday Girls (last appearance in Sensation Comics #61; next appearance in Sensation Comics #63)
• Steve Trevor (last appearance in Sensation Comics #61; next appearance in Sensation Comics #62)
• Amazons (last appearance in Comic Cavalcade #17; next appearance in Comic Cavalcade #19)
• Mala (last appearance in Comic Cavalcade #14; next appearance in Comic Cavalcade #19)
• Dean Sourpuss (last appearance in Wonder Woman #17; next appearance in Comic Cavalcade #20)

Villain(s)

• Queen Atomia (no further appearances)
• Neutron Robots (no further appearances)
• Atomia's proton followers (no further appearances)

Guest Appearance(s)

• Aphrodite (last appearance in Comic Cavalcade #17; next appearance in Comic Cavalcade #19)

Other Character(s)

• An unnamed pilot (no further appearances)
• Prisoners of Reform Island (no further appearances)
• A group of crippled children (no further appearances)

Comments:
Chap 2:"Tide of Atomic Fire"
Chap 3:"Ruler of the Atom World"

Synopsis:
Following the test detonation of an atom bomb, a small uranium microverse is created. Wonder Woman takes the atomic universe back to Paula's laboratory. Under the microscope, Wonder Woman discovers that the protons are women ruled by Queen Atomia, and that the neutrons are slave robots.

Atomia causes Wonder Woman and her friends to shrink to microscopic size. The Neutrons then take them prisoner. Wonder Woman is able to take control of the robots and escape.

Atomia then causes the atomic universe to attack a small island. Wonder Woman rescues the people, then she uses Gerta's enlarging ray to bring Atomia to normal size. Wonder Woman takes Atomia to Reform Island, where after a couple of escape attempts, Atomia is reformed with the help of a magic girdle. Queen Atomia is then sent back to her atomic universe which will never attack Earth again.