Impossible Staircase

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Project by mtairymd posted 08-19-2014 09:15 PM 4051 views 5 times favorited 2 comments Add to Favorites Watch

The Penrose stairs, also known as the impossible staircase, is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop. Although the staircase is conceptually impossible, it does interfere with your perception since it looks like a person could climb forever and never get any higher.

Watching the video is the easiest way to see how it works. I’ve included a drawing which is linked in the video description


Build Instructions:

2 comments so far

View Don Johnson's profile

Don Johnson

743 posts in 4024 days

#1 posted 08-20-2014 10:28 AM

I am familiar with this as a drawing, but could not understand how it could be made ‘in the solid’.

The video solves my confusion – very clever!

-- Don, Somerset UK,

View mtairymd's profile


283 posts in 2624 days

#2 posted 08-20-2014 09:29 PM

Thank you. I saw the drawing as well and wondered if it could be made of wood. It took a little trial and error to make it look decent.

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