Hockney paid posthumous tribute to Picasso in 1973-74 with his etching Artist and Model—showing himself (nude) and the older painter (in signature sailor's garb) seated face to face across a table.

If you find the face fast, you are likely in the top 1% of observers who can decode optical illusion pictures with answers on the fly. At first glance, it’s just birds in flight. But look again ...

Today’s optical illusion challenge is a little different from the daily ones. You need to find at least five differences in ...

The Shepard’s Table Illusion was introduced by cognitive scientist Roger N. Shepard in 1990. It is an optical illusion that ... Try to look for a small face or two wings blending into the ...

Here's what your answer to the popular optical illusion really says about you ... In Rubin's vase, seeing the faces first has been linked with higher levels of 'detail-oriented thinking ...

The color combo appears to be a go-to for Shields, who attended the The Amateur premiere earlier this month in a black-and-white optical illusion dress. The striped Balmain gown had an ...

While typically a quiz, the format can also be an optical illusion, which is an image with more than one ... you are presented with a photograph of a rocky outcrop that looks like a face, and the ...

Optical imaging includes a variety of imaging techniques that rely on illumination light in the ultraviolet, visible and infrared regions of the electromagnetic spectrum. The term typically ...

The biggest stories of the day delivered to your inbox.