Prehistory:
Stories before 4000 BCE
Natural philosophy begins where we all stand: between reality and our ideas about it, seeking truth with humility and courage.
Wisdom Mix.
Here are 10 random key ideas and takeaways.
1.
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Ancient human brains evolved gradually over millions of years, with important bursts of change, producing minds that were often far more capable than traditional stories suggest.
Subject: Brain Evolution.
The so-called Cognitive Revolution is best understood not as a single switch flipping on, but as the latest major phase in a much longer evolutionary journey. Brain size, EQ, language, memory, and symbolic thought all point to a gradual rise in human cognitive complexity across multiple ancient human species.
2.
From History: 80 Million Years Ago (+/- 10 million years).
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Subject: Evolution.
Play evolved as one of the group survival traits. Lower play abilities evolved in mammals like rodents about 190 million years ago. Higer play abilities evolved in mammals like cats about 80 million years ago.
3.
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When viewed over deep time, the idea of separate human origins fades, replaced by a simpler truth: we are one family that wandered.
Subject: Evolution.
Africa doesn’t just appear at the start of human history—it is the start. Migration, adaptation, and interbreeding shaped who we became, but they all began from a single ancestral root.
4.
From History: 635 to 590 Million Years Ago.
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By the late Ediacaran, the animal world was already moving toward proto-nervous systems and the long road to brains.
Subject: Evolution.
If the bilateral split was underway by about 580–600 MYA, then primitive nervous-system precursors were likely emerging somewhere in that broader animal story. But we still should not automatically assign a proto-nervous system to every Ediacaran organism we depict.
5.
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Writing didn’t appear fully formed. It evolved slowly as humans found ways to record, label, and preserve meaning beyond memory.
Subject: The Origins of Writing.
Writing systems emerged as a permanent way to document what was said. Writing systems either represent full words, the syllables that make up words, or our basic sounds.
6.
From History: 295 Million BCE.
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By about 280 million years ago, Dimetrodon was one of the best-known predators of the Early Permian. It stalked rivers and floodplains alongside caseid synapsids, large amphibians like Eryops, and a landscape of Calamites, Sigillaria, ferns, and early seed plants.
Subject: Evolution.
An Early Permian river world as Dimetrodon and its close kin rose into prominence, around 295 million years ago. Long before dinosaurs, these sail-backed synapsid predators hunted across warm floodplains filled with amphibians, early reptiles, giant horsetails, and seed ferns
7.
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From chemical reactions to first life.
Subject: Earth Evolution.
From chemical reactions to first life.
8.
From History: circa 5,260 BCE.
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About 7,260 Years Ago someone created the Dispilio Tablet. Discovered in 1993 in the Neolithic Settlement of Dispilio in Greece. It is an ancient wooden tablet, etched with intricate symbols, yet to be deciphered,
Subject: Writing Origins.
About 7,260 Years Ago someone etched symbols into a wood block. While Cuneiform is the earliest surviving writing system, artifacts like the Dispilio Tablet (5,260 BCE) hint at earlier forms of written communication. This wooden artifact barely survived the test of time—imagine how many other objects like this have been lost over the last 50,000 years.
9.
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We know of about 15 to 20 ancient human species within the genus Homo over the last two million years.
Subject: Ancient Humans.
If you mean “human species” as members of the genus Homo, then yes: more than 15 have gone extinct, and around 20 is a fair estimate, depending on whether you count debated classifications like Homo ergaster as separate species. The key fact is the pattern: Homo repeatedly diversified across Africa and Eurasia, then most lineages ended: through climate shifts, competition, isolation, and absorption into other populations.
10.
From History: 375 Mya.
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By about 375 million years ago, several animal lineages had evolved long-term memory to navigate a changing world, remembering feeding sites, water access, and safe routes between land and water. This likely included vertebrates like Tiktaalik.
Subject: Evolution.
Within Phylum Chordata, the lobe-finned fishes of Class Sarcopterygii were among the lineages pushing vertebrate life into new environments. By about 375 million years ago, some of these animals likely depended on long-term memory to track food, water, and safe movement between habitats. In forms like Tiktaalik, memory was becoming part of the survival toolkit for life at the edge of land.