Francis Ferrari, a French ophthalmologist, invented a controversial procedure that can change eye color. People from around ...

This illusion asks viewers to stare at a blue eye in the center of a colored image. After a short countdown, the image ...

This optical illusion asks viewers to stare at a black X inside a blue circle without blinking. The idea is to tire out the ...

Add Yahoo as a preferred source to see more of our stories on Google. Don't stare too long. Spoiler: It’s a trick question. They look kind of purple, but they’re all technically the same blue. But ...

Russell has a PhD in the history of medicine, violence, and colonialism. His research has explored topics including ethics, science governance, and medical involvement in violent contexts. Russell has ...