7 obscure yet unbelievable military weapons

History is rife with examples of human ingenuity run amok - especially in the field of weapons design.

Last year, a group of Quora users sought to answer the question, "What are some historical weapons that most people have never heard of?"

The answers provide amazing insight into the history of war, along with examples of some of the most ingenious - yet impractical - weaponry ever created.