Believe it or not, we've seen a few optical illusions in space over the year. Well, we haven't seen them – the Hubble telescope has. NASA has been sharing photographs depicting unusual phenomena among ...

Five years ago we published an optical illusion that millions of you were completely bamboozled by, and today I've found a brand-new version of that illusion. Of course, I'm referring to the rotating ...

Add Yahoo as a preferred source to see more of our stories on Google. I’ve been a cat lover my whole life, but somehow I’ve never had a gray cat. Maybe that’s why this video completely fascinated me—a ...