The rise in technology has prompted skyscrapers and wide urban areas whose inhabitants depend on motors to transport them and their nourishment supply. Complex manufacturing and construction techniques and organizations are expected to make and keep up these new technologies, and whole industries have arisen to support and create succeeding generations of increasingly progressively complex tools. The twentieth century brought a host of innovations. In physics, the discovery of atomic fission has prompted both atomic weapons and atomic power. In drug, this time brought innovations such as open-heart surgery and later stem cell treatment alongside new medications and treatments.