They create new geological features and show us things we didn't know existed. In addition to these things, they also require us to rethink and invent new technologies to help reduce the number of lives lost to tsunamis. In recent years, many different technologies have been used to protect people from tsunamis. There are devices that can detect when an earthquake is coming, devices that can tell when an earthquake might occur, and even devices that can determine its severity. For example, the Dart (Deep Water Assessment and Tsunami Reporting) buoys help maintain and improve the capacity for early detection and real-time reporting of tsunamis in the open ocean. The DART system consists of buoys positioned at locations strategic in the world's oceans. These technologies have saved many lives and will continue to save them in the future. Thanks to tsunamis, we can also find new information about our world and how it works that we don't see on a daily basis. For example, we now know the movement of plates under the ocean which would never have been discovered if we had not had the opportunity to observe tsunamis. In addition, some cities that were underwater, considered "lost cities", were found due to tsunamis. Scientists continue to research and learn more and more about tsunamis and how they work every day. And thanks to past tsunamis, we now know the precautions we can take to stay safe when a