Introduction A Triceratops needs three horns in front of its frill, but the frill has to remain wider than the...

Introduction An ankylosaurus needs a tail club large enough to counterbalance a head that rides only a few centimeters above...

Introduction A stegosaurus can carry plates taller than its own neck, so shrinking every plate toward one uniform size destroys...

Introduction Twelve dusty-pink petals have to clear four square corners without flattening the lavender and green stitches behind them. This...

Introduction A neutral flower can disappear into an ivory bedspread unless the petal ring rises far enough above the square...

Introduction A sunflower needs enough space between its brown disk and four square corners or the yellow petals lose their...

Introduction An avocado is not symmetrical from top to bottom: the narrow stem end has to taper much faster than...

Introduction A mushroom roof can tolerate a soft dome; an arched window directly beneath it cannot tolerate a crooked wall....

Introduction A turtle already carries a dome on its back; turning that dome into a strawberry changes where every shell...