Oceans cover 72% of planet Earth, generating half the oxygen we breathe. The oceans drive our planet's weather and anchor the world's water cycle. They also play a vital but as not-yet-fully-understood role in carbon cycling. But despite their essential function in our lives, the oceans remain glaringly unexplored--human eyes have only seen about 5% of their total area. Learn about specific, cutting-edge tools being deployed to explore different aspects of the ocean, including ecosystems. Read firsthand the stories of professionals in science, technology, engineering, and math who work together to build and use this technology to explore the ocean's importance to life on Earth.