Scientists found a massive underground ocean hidden 700km below Earth's surface. Here's all about it

Scientists have unearthed a massive underground ocean located 700 kilometers beneath Earth’s surface, found within ringwoodite’s crystalline structure. This hidden ocean, thrice the size of our surface oceans, may revolutionize our comprehension of Earth’s water cycle. Researchers used seismic data from earthquakes to identify these water-rich rocks, with further studies planned to understand its global impact.