High-temperature superconductors are materials that can conduct electricity without resistance at relatively high temperatures, typically above the boiling point of liquid nitrogen (−196 °C or −321 °F). Unlike traditional superconductors, which require extremely low temperatures, these materials can operate in more practical conditions, making them useful for various applications. These superconductors often contain complex compounds, such as copper oxides, and are known for their unique properties. They are used in technologies like magnetic resonance imaging (MRI) machines and particle accelerators, and they hold potential for advancements in power transmission and magnetic levitation systems, such as maglev trains.