"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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Artist David Zinn uses chalk and charcoal to draw whimsical characters in Laguna Beach, California. He creates optical illusions ...

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“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 not merely tricks or viral brain teasers, they reveal the curious disconnect between what we see and what our brain interprets. A flat drawing might come across as ...