Prior research has produced mixed results on the question of animals and their susceptibility to optical illusions, per the ...

I wouldn't recommend staring at it too closely though – it really does give you a headache, and some sort of weird motion ...

The illusion makes clever use of colour theory, demonstrating how our brains perceive colours differently against certain ...

Have you ever looked at two circles of exactly the same size and sworn one was larger? If so, your eyes have been tricked by ...

Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion.

Scientists tested two species against each other to see which was more likely to fall for an optical illusion.

This new optical illusion is testing everyone’s observation skills; only a few people can find everything in 15 seconds.

The photo shows dozens of translucent round beads glowing under a white ring light, each one catching rainbow reflections.

Whether it is salt flats in Bolivia or rock formations in Arizona, nature never ceases to amaze.