  Current digital data storage systems are able to store huge amounts of data.
Even though the data density of digital information storage has increased
tremendously over the last few decades, the data longevity is limited to only a
few decades. If we want to preserve anything about the human race which can
outlast the human race itself, we require a data storage medium designed to
last for 1 million to 1 billion years. In this paper a medium is investigated
consisting of tungsten encapsulated by siliconnitride which, according to
elevated temperature tests, will last for well over the suggested time.
