An optical illusion is a riddle where the viewer perceives the image differently. These illusions come in a variety of types, ...

Seek and Find Puzzles are images that challenge your brain and observation skills and make you believe that there is no ...

"Found this in a thrift store, it's got a note saying it's free if you can say what it does," Redditor Buttery_-_Balls wrote ...

If you have an IQ of 123 or above, this challenge is meant for you. Inside this chaotic wardrobe lies a hidden cat that’s baffling viewers around the world. Can you find it without clues or help? Only ...

Completing the top 10 most valuable items you might find in your elderly relative’s attic are porcelain dolls (£2,006), ...

Some of the faintest, coldest stars in the universe may be powered not by fusion—but by the annihilation of dark matter deep ...

Read More About the Hidden Features of Everyday Objects: A version of this story originally ran in 2017; it has been updated for 2024.

From Regency-era "fan flirting" to online dating, we decipher the timeless looks, signs and gifts that signal secret love.