Explore Science-first Philosophy

Science • Phil • Cr. Think • Hist •

STORY

Purgatorius — Earliest known proto-primate.

By Michael Alan Prestwood

Sat 3 Jul 2021
Published 5 years ago.
Updated 1 month ago.
Related Stories
Share :
© N. Tamura (CC BY-SA)
Purgatorius unio, from the Late Paleocene of North America, believed to be the earliest primate, pencil drawing, digital coloring. © N. Tamura (CC BY-SA)

Purgatorius — Earliest known proto-primate.

66 Million BCE
Grasping hand and flexible ankles

Within mammals, only primates have binocular vision, grasping hands, and flat nails–instead of claws. Purgatorius might have had all three earning it the earliest known proto-primate label. It lived in Eastern Montana about 66 million years ago during the very last years of the Cretaceous period. It lived through the K-T extinction event and the extinction of dinosaurs.

Class: Mammal; Early Proto-Primate
Time Period: Late Cretaceous to the early Paleocene
Diet: Likely Frugivorous (fruits) / Insectivorous (insects)

— 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.
Email
Print
This month @ TST
Column Menu
June 2026
»COLUMN ARCHIVE
Column Research….
1. Timeline Story
Secular Spirituality Settles
2. Linked Quote
“Extraordinary claims require extraordinary evidence.”
3. Science FAQ »
What is the difference between a spiritual and empirical belief?
4. Philosophy FAQ »
What is secular spirituality?
5. Critical Thinking FAQ »
How does spirituality relate to public belief?
6. History FAQ!
Is secular spirituality supported in history and science?
Bonus Deep-Dive Article
The Material-Spiritual Framework: A Philosophy of Spirituality

Comments

Join the Conversation! Currently logged out.

Leave a Reply

NEW BOOK! NOW AVAILABLE!!

30 Philosophers: A New Look at Timeless Ideas

by Michael Alan Prestwood
The story of the history of our best ideas!
Scroll to Top