The UnXplained 7x2 Impossible Ancient Inventions Season 7 Season 7 4 Episodes Vidsrc 7x1 - The Golden Age of Pirates 7x2 - Impossible Ancient Inventions 7x3 - The Lost 7x4 - Alien Contagion There are stories of advanced technology from the ancient past that seem too impossible to be true; these technologies challenge everything humanity thought about the innovation of ancestors.