|See - he's a bit different!|
The mosaic is based on the Rod of Asclepius, an ancient symbol of medicine and healing. I seem to recall that I've known this fact since I was a wee one and didn't need Wikipedia to glean that particular piece of information. What was news to me is that this single snake wrapped around a stick is often confused with the Cadeceus, a similiar symbol graced by two winged serpents. This was erroneously adopted as the Emblem of the US Army Medicals Corp since the officer who chose it got his facts wrong. Someone high up insisting that they're right? Now, there's a thing!