Origami is the traditional Japanese art of paper folding, which throughout its history has produced beautifully crafted objects and inventions. There is something particularly attractive about elements of the natural world recreated in delicately folded paper forms, and animals and plants have been a favourite subject for origami artists. The evolution of mathematics has been reflected in ever more complex geometric paper creations, while digital technology has enabled intricately mapped patterns. This post brings together twenty examples of ingenious origami and folded paper art and design.