Public domain. Cover image from Project Gutenberg ebook #70559. Survival of the fittest auctore Gene L. Henderson Detrahe .m4b · 49 MB Quomodo audiendum → · Problema cum hac recitatione? Animadversionem mitte → Recitator Arthur — English RP Narrator (en-GB) Diuturnitas 49 min Lingua English Additum November 5, 2026 Liber electronicus originalis Project Gutenberg Licentia Public domain FictionScience Fiction