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The gradual change of a species by adaptation over many generations for purposes ensuring it's survival.

7 votes
2 answers
571 views

A book where 2-dimensional species evolved on rapidly changing environment

I remember a book that described various lifeforms evolving in the galaxy (and i think may be the overriding theme was extinction). One of them was 2-D species evolved on rapidly changing environment …
DVK-on-Ahch-To's user avatar
23 votes
6 answers
2k views

What was the first SciFi work that theorized that Homo Sapiens were seeded on Earth by intel...

What was the first SciFi work that theorized that Homo Sapiens were seeded on Earth by intelligent aliens (as opposed to all the other Earth species which evolved separately)? The earliest one I can …
DVK-on-Ahch-To's user avatar