Engineering is an extremely broad, though highly specified career. Engineers apply scientific knowledge, acquired through years of studying mathematics, physics, and a variety of applied sciences, to solve technical problems. Aerospace and Aeronautical Engineers design and construct vessels that travel through outer space and land on distant planets. Civil engineers build the roads and bridges that facilitate and enhance national infrastructures, and chemical engineers deal with both the physical sciences and life sciences to make raw materials and chemicals more useful and valuable for human endeavors. Without engineers, the wealth of knowledge that science provides would do very little in helping humans live more capable and comfortable lives.