Introduction A pterosaur with a crest longer than its snout needs that head weight balanced before either wing is attached....

Introduction A Spinosaurus can carry a sail taller than its torso, and that is the first structural problem this pattern...

Introduction Five navy petals must occupy the center without swallowing the cream spokes that make this square look open. This...

Introduction A blue flower loses its depth when every petal is worked in the same value, so this bedspread separates...

Introduction Sixteen raised petals can make one flower nearly as thick as the cream square beneath it, so the leaf...

Introduction Eight white petals have to remain distinct after four mint corners pull the flower into a square. This mint...

Introduction A Brontosaurus loses its silhouette when the neck is only as long as the head is wide. This brontosaurus...

Introduction A Tyrannosaurus head must project far enough beyond its tiny arms that the six cream teeth remain visible from...

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...