next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
> 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
next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects