Culture & entertainment
Three-dimensional books rely on complex tab-and-slot physics
HERE’S THE INTERESTING PART
Opening a children's pop-up book triggers a highly sophisticated feat of mechanical engineering. The aggressive unfolding of a cardboard dragon relies entirely on hidden pivot points and precisely glued V-folds, applying kinetic energy so flawlessly that an impulsive toddler can instantly ruin three weeks of meticulous paper architecture.
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