The Acheulean Handaxe
The Acheulean handaxe is a teardrop-shaped stone tool worked on both faces. It is the longest-running product in human history, remaining essentially unchanged for over a million years across Africa, India, and Britain.
Knapping this tool demands mental templates and teaching. The puzzle is not lack of intelligence, but why so much competence with so little change?
| Hypothesis | Implication |
|---|---|
| High-fidelity transmission | Copying without deviating |
| Sufficient design | Environment demanded no change |
| Social signaling | Symmetry advertised the maker's skill |
Pitfall: Do not confuse design stagnation with a lack of cognitive skill. Making one requires real planning.
Fire and Neanderthals
Fire control is difficult to date because lightning causes natural burns. Archaeologists require patterns, not just occurrences, to prove control.
| Evidence | Site | Reading |
|---|---|---|
| Burnt bone, ~1 Ma | Wonderwerk, S. Africa | Suggestive, deep in a cave |
| Hearths, ~780 ka | Gesher Benot Ya'aqov | Strong, structured burning |
| Ubiquitous, <400 ka | Across Eurasia | Uncontested, routine use |
Neanderthals were not brutish cavemen. They possessed bigger average brains, cold-adapted bodies, and hafted tools using birch tar. They cared for injured kin and buried their dead.
The killer fact: Most humans outside Africa carry 1 to 4 percent Neanderthal DNA. Extinction was actually absorption.