I was walking into the BARC (where I have my office and lab) after lunch the other day, when I came upon this scene:

A closer look:

Who put them there, or why, we do not know.  But there they were and are.

Last night, hoarfrost started building up on things.  By this afternoon, my car was covered in it.  Hoarfrost can be amazing, with long fern-like feathers growing off of surfaces.

The best was the spiral effect the frost that grew on the antenna made.