"Everything we think is real is, in some way, an illusion." Former NASA illustrator Kurt Wenner makes incredible, brain-busting chalk illusions. His works start with diligent planning, beginning with ...

“I like the science behind it. I love to see people’s reaction,” says artist Naomi Haverland of her 3D art. The Florida resident shares her process for creating optical-illusion chalk art and vibrant ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...