Get smart curated videos delivered to your inbox every week.      
The Kid Should See This

Kokichi Sugihara’s Impossible Rooftop & Folding Ladder Illusions

File under impossible objects, this is the Impossible Rooftop Illusion or “Anti-Gravity Two Sided Roof” by Meiji University’s Professor Kokichi Sugihara in 2013. Using computer software, Sugihara creates award-winning, perception-bending 3D models that seem to defy geometry. While the structures look impossible from one angle, viewing them from another angle reveals the illusion. Of the computer-designed impossible motions, he writes:

“Computational illusion” is aimed at studying human visual illusions mathematically. If we could reveal how and under what conditions human visual illusions occur, we would be able to numerically express the strength of visual illusions and control the quantity.

Here’s one more, via Nautil.us: Folding Ladder.

Watch related videos about perception and optical illusions. There’s also more of Sugihara’s work in the archives, and the article at Nautil.us: The Illusion Machine That Teaches Us How We See.

This award-winning video collection is reader-supported. Become a sustaining member to keep TKSST online and free for everyone, including teachers and parents who use it as a resource to spark learning and curiosity for kids.

🌈 Watch these videos next...

The mathematics of sidewalk illusions

Rion Nakaya

A Basic Demonstration of Optical Cloaking

Rion Nakaya

Professor Kokichi Sugihara creates his mind-blowing illusions with math

Rion Nakaya

Make a 3D “hologram” using your smartphone & a CD jewel case

Rion Nakaya

It’s different from what you expected – Design Ah! (デザインあ)

Rion Nakaya

The Stroop Test

Rion Nakaya

Three quirky sleight of hand illusions by Richard Wiseman

Rion Nakaya

Can you see all 12 of these dots at once?

Rion Nakaya

Fred Harwin hand paints highly detailed prosthetic eyes

Rion Nakaya