[harmonygirl]

HBD,
I think this is more than simply biological. I think there is an emotional (or even spiritual) aspect. There was recently a case here in British Columbia where the wife of an elderly couple was moved from the medical care unit she was staying at with her husband ("because it wasn't a long term care facility") to a place that was quite a distance away. She died shortly after being moved. Her husband followed her to the grave after about a week. I think there is a bonding that happens to us that is similar to non-locality in quantum theory, that allows for instant communication and perhaps instant sympathetic response.