io9:
Add this to the list of things we never knew existed but now desperately need: The Evolution Door, a “flip-panel” invention by Austrian designer Klemens Torggler.
We’ve all opened a thousand doors but I bet you’ve never opened a door like this.
I can’t stop watching this door open & close
Reminds me a tiny bit of a camera iris but without the overlap.
Reinventing Wheel, meet Reinventing Door.
smooth riding square wheels anyone ?
http://mathtourist.blogspot (dot) fr/2011/05/riding-on-square-wheels.html