Mechanical engineering is a core branch of engineering and covers the broadest engineering discipline. This engineering field provides an understanding of core concepts like mechanics, kinetics, thermodynamics, material science, structural analysis and industrial engineering and management. Mechanical engineers, use these core principles along with tools like CAD engineering and product life cycle management to design and analyze manufacturing plants, Industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics and  medical devices. One can say that from needle manufacturing to spacecraft manufacturing, mechanical engineers are playing an important role. The branch has continuously evolved to incorporate advancements in technology. Today mechanical engineers are pursuing development in fields like composites, mechatronics and nanotechnology. Mechanical engineering overlaps with aerospace engineering, civil engineering, electrical engineering and petroleum engineering to varying amounts.