From Greek Reporter:
After ten years of work, involving the expertise and goodwill of an extraordinary number of people working around the globe, the Archimedes Palimpsest Project has released its data. It is a historic data-set, revealing new texts from the ancient world. A complete facsimile of the revealed palimpsested texts is available on Googlebooks as “The Archimedes Palimpsest”.
Archimedes (285 to 212 B.C.) is one of the greatest scientists of all times, yet many of his writings were lost. Fortunately, a Greek original, namely the Archimedes Palimpsest, has recently been discovered. The manuscript was written in the 10th century. In the 13th century, it was taken apart, and the Archimedes text was scraped off. In 1906, the under text was recognized by J. L. Heiberg, professor of classics, as containing previously unknown works by Archimedes. The “Archimedes Codex” which was recently published in English and German contains seven of the Greek mathematician’s treatises. Most importantly, it is the only surviving copy of On Floating Bodies in the original Greek, and the unique source for the Method of Mechanical Theorems and the ancient puzzle Stomachion.
… I believe this is what they’re referring to …