This issue has variants.
The on-sale date is the publication date reported in U. S. Copyright Office filings.
Distributed to newstands in August 1963. This issue includes 10 pages of paid advertisements.
Distribution date from Joseph Marek's Marvel Comics Group history website.
Inks credit from Nick Caputo via the GCD Error List (30 August 2006); the original indexer credited Dick Ayers.
Aluminum actually has a significantly lower melting point than iron.
Text story with illustration.
This is a retelling of "The Coming of the Krills" by Stan Lee and Steve Ditko from Amazing Adult Fantasy (Marvel, 1961 series) #8 (January 1962). Letters credit from George Olshevsky's Marvel Comics Index.