While the illusion isn’t unique to the Pyramid, no building in San Francisco exemplifies the effect quite like it. The pyramid’s strange shape and its long, tilted lines share a historical ...

They speculated that a total of 10 balls formed the pyramid's base, followed by six on the second tier, three for the third, ...

Optical illusions serve as a fantastic brain exercise ... the post displayed an array of multi-hued spheres configured into a pyramid shape. Accompanying text inquired: "How many balls can ...

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The subtle concavity of the pyramid's faces creates an illusion that can only be fully appreciated from the air. Akio Kato noted: "This concavity is so subtle to be seen from any ground position ...