Scientists at University of Southampton have developed a 5D optical data storage crystal, sometimes called an “eternity crystal.” Using femtosecond lasers, data is written into nanostructures within quartz glass, allowing information to be stored in five dimensions. The crystal can theoretically store up to 360 terabytes of data and withstand extreme temperatures, radiation, and time—remaining readable for billions of years under stable conditions. Important Details: • 5D optical data storage te