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STORY

First Vertebrates

By Michael Alan Prestwood

Sun 12 Sep 2021
Published 4 years ago.
Updated 2 years ago.
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First Vertebrates

530 Million BCE
530 to 520 Million Years Ago

The earliest known vertebrates originated about 530 million years ago during the Cambrian explosion. 

  • Domain: Eukaryota > Kingdom: Animalia > Phylum: Chordata

— 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.
This Week
February 4, 2026
»Edition Archive
WWB Research….
1. Story of the Week
Max Planck
2. Quote of the Week
“It was an act of despair, to sacrifice physics for the sake of finding an explanation.”
3. Science FAQ »
Why is Planck time important?
4. Philosophy FAQ »
Did talking our way through life drive a million years of brain growth?
5. Critical Thinking FAQ »
Why do we struggle to recognize the limits of our own thinking?
6. History FAQ!
Has Planck’s Constant been updated?
Bonus Deep-Dive Article
Empty Space: A Dive into Particle Physics
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