Frontiers refer to new, cutting-edge areas of research that are pushing the boundaries of knowledge and understanding in a particular field. They often involve interdisciplinary approaches, innovative methodologies, and the exploration of new ideas or technologies. Frontiers research seeks to address complex and challenging problems, and can lead to breakthrough discoveries that have the potential to significantly impact society, technology, or the environment. Researchers working in frontiers are at the forefront of their field, pushing the boundaries of current knowledge and exploring new avenues for exploration and discovery.