I wasn't a particularly gifted pupil at drawing,' MC Escher once said. 'I wasn't bad, but I certainly wasn't exceptional.' In fact it was in graphic artistry that he found his muse. His fondness for ...

M.C. Escher seems as puzzling as his art ... Look again: The center core of birds that appear to be only white ones on a black background are reverse images of that background, which are actually ...