3D printing can also be done with metals. It is possible to produce custom and complex designs, similar to plastic 3D print models, in solid metal. This is known as additive manufacturing, and it has been introduced globally in many big companies and is starting to be used in real applications – for example, in Formula 1 racing cars and fighter jets.
Brittle stars (also called serpent stars) are closely related to starfish. They crawl across the sea floor using their flexible arms for locomotion. They generally have five long, slender, whip-like arms which may reach up to 60 cm in length on the largest specimens.