The largest and deepest ocean on Earth is the Pacific Ocean. Covering more than 63 million square miles (165 million square kilometers), it accounts for about 46% of the Earth's water surface area. The Pacific Ocean is also home to the Mariana Trench, which reaches a depth of approximately 36,000 feet (about 10,973 meters) at its deepest point, known as Challenger Deep. This ocean is significant for its biodiversity, serving as habitat for countless marine species and ecosystems. It plays a crucial role in global weather patterns, climate regulation, and international trade.