Sometimes you see things that make your heart sing with the joy of human ingenuity. These beautiful and mesmerising door designs made me feel just that.
They are the brainchild of Austrian artist Klemens Torggler who has been working on different designs for some years. The steel version is, in engineering terms, beautifully elegant - but impractical. I can envisage some nasty trapped finger moments. The latest origami-like 'Evolution' model poses no such problems, having soft edges.
I don't know - last week it was origami robots, this week doors! Is this a trend?