by Leigh Wortley
Protect your iPhone with a one-piece, impact resistant, flexible plastic hard case featuring an extremely slim profile. Simply snap the case onto your iPhone for solid protection and direct access to all device features.
The Penrose triangle, also known as the Penrose tribar, is an impossible object. It was first created by the Swedish artist Oscar Reutersvärd in 1934. The mathematician Roger Penrose independently devised and popularised it in the 1950s, describing it as "impossibility in its purest form". It is featured prominently in the works of artist M. C. Escher, whose earlier depictions of impossible objects partly inspired it.