Scientists Crush Diamond at Neptune‑Like Pressures, Solving Two‑Decade Mystery

In a landmark experiment, researchers compressed diamond to pressures exceeding those found inside Neptune and Uranus, a level previously unattainable in the laboratory. The study reconciles long‑standing discrepancies between theoretical predictions and astronomical observations of diamond behavior under extreme conditions. By mapping how diamond’s structure changes at these crushing pressures, the team has identified key mechanisms that could enhance fusion energy production on Earth. Additionally, the findings shed light on the exotic diamond rain theorized to form in the deep atmospheres of ice‑giant planets, offering new insights into their internal composition and dynamics.