Term: Tumulus, Description: Mound of earth and stones raised over graves, Question: Has a tumulus been discovered on Mars?, Answer:No
Fact1: A tumulus is a mound of earth and stones raised over a grave or graves. Fact2: A grave is a location where a dead body (typically that of a human, although sometimes that of an animal) is buried. Fact3: Mars has only been explored by unmanned spacecraft. Fact4: Evidence suggests that the planet was once significantly more habitable than it is today, but whether living organisms ever existed there remains unknown.  