Tesseract

 AKA Hypercube

 


 necker cube from en.wikipedia.org

The Necker Cube  

The Necker cube is an optical illusion that was first published as a Rhomboid in 1832 by Swiss crystallographer Louis Albert Necker. Wikipedia

 

 

 

 

Google wide range here

1 here

Tesseract 

 Schlegel wireframe 8-cell.png 

 source

The tesseract can be unfolded into eight cubes into 3D space, just as the cube can be unfolded into six squares into 2D space. source
 
      
 
 
 
 
An animation of the shifting in dimensions
source

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