At Mobile World Congress in Barcelona today Google has a number of Android experiments its Creative Lab team built to see how far it could push mobile devices. One that caught my eye, however, is this ...

Add Yahoo as a preferred source to see more of our stories on Google. Optical illusion drawing. Optical illusions are fun to examine, but making your own brings the fascination to a new level. If that ...

A topsy-turvy staircase leading nowhere. Two hands drawing themselves into existence. Interlocking birds that morph into fish, and back again. Dutch graphic artist Maurits Cornelis (M.C.) Escher’s ...