The skull rose by Todd Terwilliger
This is an example of pareidolia, where we see something unexpected and unplanned in an image.
Although it wasn’t an optical illusion, the skull and rose image was used as an illustration for the Rubaiyat of Omar Khayyam, a translation of Persian poems.
Illustration by Edmund J.
That image might be familiar to you, since it was used by an artist when he was designing a poster for a band called The Grateful Dead.
Grateful Dead poster by
Stanley Mouse, 1966
For another example of a skull flower, this time created intentionally as an optical illusion, see: The skull flower garden optical illusion, Deceptology>>
More about skull optical illusions: The world’s most famous optical illusion, Deceptology>>
– I found the skull rose photo by Todd Terwilliger at Phil Plait’s Bad Astronomy in Discover magazine, Skull Flower, Bad Astronomy>>
– Photo taken by Todd Terwilliger, Flickr>>
– In case anyone is interested… RobertARood>>
(And in a side note, I agree 100% with Mr. Plait’s mini-diatribe about
how some sites use images without giving credit to the originator. It’s
not only the right thing to do, but you never know what you might find.)