Made of rubber, metal, glass and wood, these dynamic flip panel doors tackle perhaps the world’s original architectural invention in a series in a fresh, new and interactive fashion.

Each member of the Evolution Door set by Austrian artist, designer and builder Klemens Torggler involves a multi-panel contraption the flips open and re-closes in a fantastic feat of kinetic motion.

The steel version of the door is particularly ingenious as its space-saving method of action. Like its sliding cousins, it avoids the in-and-out motions of a typical doorway to minimize the space you need to set aside in front of or behind it.

The glass design uses a minimalist framework of structural supports, all of which then disappears entirely into a secret wall space hidden alongside it.

With steel and glass variants in particular, though, viewers are sure to wonder how one avoids getting a finger pinched if they are not paying full attention,  hence this short video regarding benefits of the softest member of the Evolution family.

Aside from the finger-friendly end result, there is something brilliant in the common approach of these works: each bypasses all positions outside of the binary ones – these doors are either opened or closed between uses, never resting anywhere in between.