The other day while I was out working in the community I ran into a former coworker who was also working in the community. He just happened to be walking out to his van as I was pulling up to inspect a house across the street from where he was working. In a metro area of one and one half million people, the odds of a chance encounter are pretty long. On the other hand, there is no scientifically validated explanation for him coming out of the house at the same time that I was getting out of my truck other than serendipity. Are there ways in which human beings communicate with, or detect the presence of one another that are not apparent to us? I suspect there may well be!