There are some things that, despite science's best efforts to understand, they remain shrouded in mystery. We know that ancient civilizations had skills and knowledge we cannot comprehend today but until we find more clues about their lives, we'll never really know how they achieved many of their miracles. Some scientists believe that we are missing some past elements, including various technological discoveries that we don't possess or replicate. This video will present 20 of the most mysterious ancient technologies that baffle scientists. The last one on the list will leave you even more confused than you were before.