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Louis Albert Necker

Necker Cube - L.A. Necker, 1832
	Where is the green side ? On the front of the cube or at the back ? Keep looking at the cube and you'll find that it switches a few times. First described by professor L. Necker who noticed this while studying drawings of crystals.

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Last modified on Tuesday, September 23 2008

Louis Albert Necker

Necker Cube - L.A. Necker, 1832