Posted 4 years ago on Oct. 20, 2012, 8:44 p.m. EST by Phanya2011
from Tucson, AZ
This content is user submitted and not an official statement
I just found this link to a discussion of the above concepts and was, once again, amazed at my own ignorance about so much. The link is to the third part of a series, but it has links at the top to the first two, which seemed the easiest way to share it. So much to learn. The comments found at the end of each section are also informed, interesting and civil.