Mind's eye

Look: This black hole illusion reveals an innate evolutionary instinct

Akiyoshi Kitaoka

Take a close look at the black hole in the center of this image.

Akiyoshi Kitaoka

Did the hole seem to expand as you gazed at it?

For most people, this illusion shows an ever-growing void and invokes a feeling that you may be about to enter a tunnel.

Akiyoshi Kitaoka