Optical illusions are proven tools to understand the way the brain functions. It helps in bringing out hidden personality traits of which you are unaware. Optical illusions are also fun.

Optical illusions challenge your observation skills by presenting familiar objects with hidden mistakes. A watch dial with the number 9 repeated twice instead of a 10 tricks many people.

Optical illusions are useful for improving concentration and visual perception. In this challenge, readers must find a hidden cat among a group of owls within nine seconds. Clues suggest looking ...

such as the ever-thorny problem known as the Hubble Tension and new data from the Dark Energy Spectroscopic Instrument (DESI)—shows that dark energy may actually be an illusion caused by the way ...