They are not new either, with the Mars monolith being captured in 2008, and the Phobos monolith being photographed way back in 1998. This is not the first time the monoliths – a single upright ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a host of other puzzles connected to the solar system's deep past ...

These challenges are primarily some riddles and puzzles. So, if you are struggling to find the answers to the puzzles, you are at the right place. In this guide, we have compiled a complete list of ...