Re: Re: '...In Nature'...?
Alfie,
Seems the thread's been hijacked by pyramids (not complaining though - I love subtexts and tangents in threads - but someone really interested in discussing this topic may miss out because of the thread title)
However, to keep the main point of this thread - now almost a subtext - could I reply to the threads initiator......
Always Free said:
I guess what I mean by 'nature' is something that has formed, grown, into something with a straight line or edge to it. We are formed naturally, yes but our products are made by us therefore we can make whatever shape we like. Your ruler is not a naturally formed object. A beaver would never build a dam with perfectly straight lines, but his dam is not a naturally occuring object.
By this definition, everything produced by physical processes and by plants would be regarded as "natural". We are therefore excluding anything/everything produced by animals. Is that right? (Not criticising, just asking)
Always Free said:
Light coming from a source, eg the sun, I would have thought travels three dimensionally---in other words, all directions at once not a straight line.
Or does it travel in straight lines in all directions?

On another level, however, no beam of light can be completely shielded from the effects of gravity although, of course, the effect would be vanishingly small in many instances.
And we also have the possibility of curved 4D space.
Always Free said:
The spider web was a good choice but I wonder what it looks like under a microscope.
Then there are no straight lines in nature.
Put any apparently straight line under a powerful enough microscope and that straight line will disappear - unless you can make molecules line up in a straight line. Even then, what about the bits between the molecules - all we really have is a series of points lined up in a straight line not an actual straight line.
Always Free said:
The horizon is definitely not a straight line as the Earth has a curved surface and unless you have a perfectly occuring flat landscape or sea surface, the line of the horizon is not going to look flat.
I think you have that one covered, Alfie.
Always Free said:
The photos of the underwater city had to be man made, yes?
Even if not, it would not survive being put under the microscope.
Always Free said:
As for the fracturing basalt, I suspect if we took a closer look, that the edges of the fractures would be rather rough and uneven looking. Therefore before the basalt fractured, it didn't have any straight edges or lines in it.
Yes, it all depends on your level of abstraction doesn't it?
regards,
BillyJoe