Ice7 is a high-pressure phase of water ice that forms under extreme conditions. Scientists have discovered that this unique form of ice can exist at pressures exceeding 2.5 gigapascals, which is more than 25,000 times the atmospheric pressure at sea level. Ice7 has a distinct crystalline structure that sets it apart from other forms of ice. Its study is significant for understanding the behavior of water in different planetary environments, particularly in the icy moons of the outer solar system. As researchers explore Ice7, they hope to gain insights into the mysteries of both water and planetary science.