It is actually very normal for new finds and discoveries to first puzzle scientists in their relevant fields. What is a new discovery all about, what is its context and what can it tell us that is significant to the bigger picture? But then there are discoveries that do not simply cause speechlessness for a moment. Many finds cannot be explained or put into a larger context, even years later, and quickly these things become a great mystery to the relevant fields. This is also the case with the following examples, which have been analysed frequently and for which there are many theories, but proof for these theories is still lacking in many cases.