《古代外星人》节目组探讨了外星人造访地球已有数百万年之久这一有争议的理论。从恐龙时代到古埃及，从早期洞穴绘画到美国的目击事件。每一集都为围绕问题辩论、第一手资料和基础理论提供了历史性的深度。几千年前，来自外太空的智慧生物是否曾造访过地球？ 　　Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, early cave drawings to sightings in the US. Each episode gives historic depth to the questions, fi...