Most people are convinced they see the world exactly as it is, until a viral illusion quietly proves otherwise. The latest circle-filled puzzle racing around social feeds is a reminder that even ...

Add Yahoo as a preferred source to see more of our stories on Google. Illustration: Guardian Design (Illustration: Guardian Design) It started with an argument over a blanket. “I’m a visual ...

A new test called "Is my blue your blue?" reveals how different -- or similar -- your color perceptions are compared to everyone else. First there was “the dress,” then there was the sneakers, now ...

Like clockwork, every few years viral relationship “tests” or “theories” will resurface online, prompting renewed discourse about the state of romantic unions. The latest test doing the rounds: the ...

A neuroscientist explains why you shouldn’t measure your partner’s love with the viral ‘bird test’ this Valentine’s Day.