[Nadieh] has been working on this jigsaw puzzle that displays a fireworks-like effect whenever a piece is placed correctly ... The puzzle is a hexagonal shape and based on a hexagonally symmetric ...

"It's long been known that the endothelial cells of lymphatic vessels resemble oak leaves or jigsaw puzzle pieces. The reason for this peculiar shape has, however, remained a mystery, and ...

The lymphatic system plays a key role in maintaining the body's fluid balance and supporting immune defences. Lymphatic vessels are composed of a ...

At least if your family likes jigsaw puzzles. The idea is very simple ... It’s got options that let you customize the piece count and shapes, and then download the result as an SVG image.