According to the United Nations, half the languages spoken today will disappear by the end of the 21st century. Versions of the Rosetta Disk, like their namesake the Rosetta Stone, should provide enough snippets for future beings to parse long-gone words and read the written history of our world. Produced in two sizes, one the size of a dime and one the size of your palm, the nickel discs contain bits of up to 1,500 tongues, including Mandarin, English, and Bahasa. At 1,000-times magnification, the surface of the larger model reveals 13,500 pages of vocabulary and translations of The Bible’s Book of Genesis; among other entries, the coin-size variant houses the preamble to the U.N. Universal Declaration of Human Rights. Inert nickel resists rust and has a melting point of 2,600 degrees Fahrenheit, so each one should last a few thousand years. But its creators—the California-based Long Now Foundation, a group advocating for future-proof thinking—are just as concerned with ubiquity as they are with longevity. They’ve already distributed dozens of the miniature archives, including one the European Space Agency deposited on a comet, and another that SpaceIL and Israel Aerospace Industries crash-landed on the moon. The more copies the organization makes, the greater the chance one turns up in the next millennium.