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First True Animals – Comb Jellyfish

By Michael Alan Prestwood

Sun 12 Sep 2021
Published 5 years ago.
Updated 3 weeks ago.
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Jellyfish moving through water
Jellyfish moving through water

First True Animals – Comb Jellyfish

555 Million Years Ago (+/- 5 million)
Nerve nets and muscle cells

Through genetic analyses, scientists now believe the Comb Jellyfish is the earliest known true animal to evolve on Earth. Prior to this genetic analyses, simple sponges were thought to have evolved first.

— map / TST —

Michael Alan Prestwood
Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
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April 8, 2026
»Column Archive
WWB Research….
1. Story of the Week
Pragmatism
2. Quote of the Week
“Our statements about the external world face the tribunal of sense experience not individually, but only as a corporate body.”
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4. Philosophy FAQ »
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5. Critical Thinking FAQ »
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