The ocean, covering over 70% of Earth's surface, remains one of the least explored frontiers on our planet. Beneath the waves lies a world teeming with life, geological wonders, and untold mysteries. Underwater exploration has advanced significantly over the past century, driven by technological innovation and a growing understanding of the ocean's critical role in Earth's ecosystem. This article delves into underwater exploration's history, techniques, and significance, highlighting its contributions to science, conservation, and our understanding of the planet. Understanding...