Close your eyes and picture the Transamerica Pyramid. For most people living in the Bay Area, it’s an easy exercise. The pyramid appears in postcards, films and murals, and punctuates the city’s ...

A supposedly 3D optical illusion has been posted online and is possibly the most divisive I've ever seen on the optical illusion. Comments are either steadfastly denying any effect whatsoever, with ...

A stereogram optical illusion is a fascinating visual puzzle that hides a 3D image within a 2D pattern. At first glance, it appears to be a random collection of repeating designs or colourful dots.