While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

There is no glue, no cutting—only precision, patience, and a deep understanding of form.

Imagine THIS. A scene ripped straight from the wildest fantasy, a moment of raw power and unexpected humor captured in a ...

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Everyone loves an optical illusion — even if they leave us completely stumped — and they're all around us in the natural world. From an underwater waterfall in the Indian Ocean to a surrealist scene ...

Finding the hidden number in this zigzag optical illusion in under 21 seconds is a sign of above average vision. Take the test and find out what your eyes are capable of.

Most people use the terms “optical illusion” and “visual illusion” interchangeably, much like “fluid” and “liquid” or “sofa” and “couch” are synonyms. At first glance, this might be seemingly pedantic ...

Have you ever scrolled through your feed, paused at a weirdly shaped drawing, and realized that what you see is completely ...

Two NASA astronauts had some fun during the ISS' capture of a robotic cargo spacecraft on April 13, pretending to hold onto ...