Optical illusions have intrigued humans for generations, blending art and science to trick our perception. A vintage-themed ...

A vintage image of a sailor looking out to the ocean also shows his wife nearby, but 99% of people can't spot her.

I heard that we see upside down, but our brain flips the image. How does it do that? –Jasmine, Mount Evelyn, Victoria. Our eyes work thanks to light.