Youth Gas

Youth Gas ("Wakagaeri gasu" 若返りガス) - originally titled "A Living Meteorite", and later, "Rejuvenating Gas" - is a chapter of the Astro Boy manga which originally ran in Shonen magazine in February 1955.

Collected Volumes
This story has been collected in the following volumes:


 * Astro Boy, Volume 3 (Kodansha)
 * Astro Boy, Volume 12 (Dark Horse)