Two weeks ago temperatures fell below -10°C (14 °F), and while this did not stop me to commute by bicycle, the windows in my office showed their age: In new buildings, high-level insulating windows are obligatory since decades now, but 50 years ago simple non-evacuated 2-pane window glass was standard. At least they gives nice frost patterns.
I like this one!
Thanks, David. This scenery was extremely short-lived – only minutes later when the sun had risen a bit more, it was gone.