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About TouchstoneTruth
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Home ▾
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About TouchstoneTruth
→ Mike’s Living Touchstone Project
About Michael Alan Prestwood
→ Mike’s Must-Reads
→ Amazon Author Page
Contact Mike
Practice ▾
TST Practice
→ Install App
TST Practice Tools
About TST Practice
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The Prestwood Column
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→ Substack Home
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When did play evolve in mammals?
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Evolution
12 Dec 2025
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Are bonobos and chimpanzees separate species?
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01 Jan 2026
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What great apes have fur and which have hair?
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What is the IQ of a chimpanzee?
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10 Oct 2026
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