Non veni pacem mittere, sed gladium.
I have never heard nor seen of this before. Where's my lightswitch?
Mike - how do we really know that all them other frequencies and wavelengths and so forth exist. After all we are just taking some scientists word for it.................much less where the switch is.
Perhaps also a lesson in humility. Humans think that they know so much, and perhaps we do, but there is also so much out there that we can't even directly perceive, let alone begin to understand.