Scientific Mysteries: How Old Is Mankind?
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Overview:
- Title: Scientific Mysteries: How Old Is Mankind?
- Author: L. Taylor Hansen
- Year: 1942
- Type: Essays
- Series: Scientific Mysteries
Editions/Publications:
- Unknown. Amazing Stories, October 1942 (Unknown, L. Taylor Hansen, Ziff-Davis Publishing Company, $0.25, 244 pages, pulp, MAGAZINE)
- Unknown. Amazing Stories Quarterly (Reissue), Spring 1943 (Unknown, L. Taylor Hansen, Ziff-Davis, $0.35, pulp, MAGAZINE)