First, nuclear medicine involves radioactive tags that are placed in the body to identify problems with organ functions (patient care). This not only allows doctors to determine which organ is malfunctioning, but also how to fix the problem. Another example is radiotherapy, which involves using radiation to destroy cancer cells by damaging their DNA (What is radiotherapy). Second, the heat provided by nuclear power can also be used for processes such as desalination and water purification (other uses of nuclear technology). Finally, nuclear energy is used in the form of radioisotope thermal generators, or RTGs. Generating electricity using the heat caused by the disintegration of radioactive materials, RTGs are used to power probes and rovers linked to space missions (radioisotope power systems). Without RTG, missions such as the Voyager probes, the Mars rovers, and the Cassini mission to Saturn would not have been possible. Nuclear energy, beyond energy consumption, is a direct catalyst for innovation and