This illusion – named Pinna's Illusory Intertwining Effect – first appeared in Shifts of Edges and Deformations of Patterns written by Baingio Pinna and Richard L Gregory, an academic journal ...

This optical illusion tests not just your eyes, but your brain, culture, and environment as well. Here's what science has to ...

This visual puzzle challenges you to spot the lone "69" hidden among a sea of identical "66"s—testing your focus, pattern ...

Spoiler alert: the odd number is 15, and it appears subtly in the middle of the image, among the consistent “12s” and “21s.” It doesn’t jump out immediately because it's designed to blend in with the ...

A man who spent two days searching for his lost wallet has caused a stir online after sharing a photo of the unbelievable ...

Tucked away in Mechanicsburg, Pennsylvania sits a secondhand paradise so magnificent that fashion-conscious shoppers with tight budgets have been known to plan entire day trips around it—CommunityAid ...

The more scientists study the Red Planet, the more they find unusual objects and patterns scattered across Mars' surface. As ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception.

We’ll close out the work week with temperatures a few degrees above normal. Normal for this time of year is in the mid to upper 70s, and we’ll see highs today and tomorrow range from the mid ...