A student who was working on his Master's thesis found Einstein's German-language manuscript by accident from the archives of Leiden University's Lorentz Institute for Theoretical Physics. The manuscript is a hand-written paper written in German by EINSTEIN himself, the paper has lots of Einstein's notes in it as well as his editor's. Allegedly also Einstein's fingerprints were found from the paper.

The 16-page long manuscript was written, according to the date on the paper, in 1924 and has the title "Quantum theory of the monatomic ideal gas". The contents of it have been released to public as well. However, I don't feel neither of us would benefit from the descriptions about what was in it exactly, as I think not me or even you would actually understand what it is talking about. But the discovery itself is definitely a great one. Einstein wasn't really just a guy who one 'could' know, but rather he was a scientist who made huge contributions to the human kind.