{Universal and Local Period Doubling}[13th January 1990]

[Redbook7:16-19][19900113:1825]{Universal and Local Period Doubling}[13th January 1990]

19900113.1825

*‘At the beginning of the geological phase now called the Tertiary Period – about 65,000,000 years ago – there were in existence the most primitive of the Primates.**

‘Stone tools first appear in the archeological record as crude pebble choppers with no more than a few flakes removed from one side; they have been found at sites with fossils that date to 2,000,000 years ago. By the middle Pleistocene the tools had developed into finely-made, symmetrical, ovate-shaped handaxes that were flaked on both sides and carefully trimmed or retouched to produce straight edges. These are the first standardised artefacts (ie objects made systematically to conform to a pattern preconceived in the maker’s mind) and are the first to show that the toolmakers’ considerations were aesthetic as well as functional.’

(The arbitrary date of transition from Pliocene to Pleistocene Epochs is about 2,500,000 years ago {+}, when the climate in many parts of the World began gradually to cool.)***

(Rough workings)****

*(ref VI... (late) [[Redbook6:335-336][19891026:1454b]{Prehistory Cycles}[26th October 1989]ff])

**E[ncyclopaedia] B[ritannica] 18:932

***E[ncyclopaedia] B[ritannica] 18:946

****E[ncyclopaedia] B[ritannica] 18:936

****[Workings struck through in ms, and omitted here]

[continues]

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