[NatureNS] Neolithic stone rings etd.

Date: Mon, 18 Aug 2014 23:12:34 -0300
From: Doug Linzey <doug.linzey@gmail.com>
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&gt; worked out a way to divide a disk edge into 360 equal parts u
Nicely put, Dave.

I'm reading _1491_, by Charles C. Mann. It's an account of what the 
Americas looked like pre-Columbus. There was a lot of relatively 
advanced civilization happening between here and Tierra del Fuego for 
many centuries.

Cheers,
Doug Linzey
Arlington

On 18/08/2014 9:07 PM, David & Alison Webster wrote:
> Hi Steve & All,
>    I think you are confusing theoretical logic with practical know how 
> and these northern folk had an impressive amount of know how.
>
>    For example, the walls of the  Knop of Howar  (occupied 3700 
> BC-1800 BC) are still standing. How many of our structures will still 
> be around  4000 years  from now ? They lived on islands so likely knew 
> how to build boats that could actually be steered ( able to go out, 
> turn around and come back) and which cost less than a king's ransom.
>
>    You don't need to be a Greek Philosopher to notice that the 6 
> points of an undamaged snowflake are of equal length, and would 
> therefore fit a circle of diameter equal to the distance between 
> opposite points. And you need only look at some of those prehistoric 
> cave paintings or ornamented spear throwers to realize how visually 
> gifted some of these early people were.
>
>    Ivory and bone needles, some so thin that horsehair was the 
> probable thread, date from 15,000 BP. It takes skill and a steady hand 
> to craft the necessary stone gravers and then carve and polish even a 
> relatively crude needle.
>
>    Over much of the last 10,000 years fires were made using a fire 
> drill or a fire plow. Try this some fine afternoon, as a test of 
> eye-hand coordination and physical stamina.
>
>    Based on current conditions around the world and examples from 
> recorded history and prehistory that I have noticed, I suspect that, 
> at least over the last 30,000 years, there has never been a shortage 
> of creative and inventive people, only a shortage of conditions in 
> which these qualities could be exercised without penalty.
>
> Yt, Dave Webster, Kentville

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