"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld puzzles require ...
Boing Boing on MSNOpinion
Two twisty doughnut shapes solve a 150-year-old geometry puzzle
In 1867, French mathematician Pierre Ossian Bonnet proved something that seemed like common sense: if you know how far apart ...
Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld ...
MANILA, Philippines — My sister used to dislike jigsaw puzzles. In fact, when I showed her some really cute ones as we roamed a bookstore years ago, my excitement over the array of choices was met ...
A Geometric Zig Zag Lines of 3D Effect Vector Optical Illusion is a fascinating visual puzzle that hides a 3D image within a 2D pattern. At first glance, it appears to be a random collection of ...
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