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First Multicellular Animals

By Michael Alan Prestwood

Author and Natural Philosopher

09 Sep 2021
Published 4 years ago.
Updated 2 years ago.
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First Multicellular Animals

640 Million Years Ago
640 to 600 Million Years Ago

First Multicellular Animals

Organisms that consist of more than one cell took several billion years to evolve from unicellular organisms. All species of animals, land plants and most fungi are multicellular, as well as many algae. A few organisms are partially both such as slime molds and social amoebae.

  • Domain: Eukaryota > Kingdom: Animalia > Phylum: Porifera (sponges)
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 analysis in an emerging AI era where the credibility of information is increasingly contested.

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WWB Menu
31 Dec 2025 Edition
Story of the Week
Platypus–Ape Common Ancestor
Quote of the Week
“I have a worldview. So do you.”
Weekly Crossroads!
1. Science »
Is “the speed of light” really the best name for the universe’s maximum speed?
2. Philosophy »
Was Einstein’s Theory of Relativity ever irrational?
3. Critical Thinking »
Why we only remember the good parts of vacations and forget the bad?
4. History!
Who is the father of numerology?
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