Laura Welcher, Director of the Rosetta Project, introduces us to the Rosetta Disk, a three-inch puck of microscopically etched nickel and titanium documenting 1,500 human languages. Inspired by the ancient Egyptian Rosetta stone, the Rosetta disk is intended to serve as a long-term cultural backup, a durable archive of ever-evolving (and rapidly disappearing) linguistic forms. A copy of the disk is currently on board NASA’s Rosetta spacecraft.