29:58From the First Journey Out of Africa to Modern Refugee CrisesThe great human migration began about 70,000 years ago when a small community in East Africa moved north to survive…4 조회수
31:46The Nazca Lines Were Built for Something We Still Don't UnderstandThe Nazca Desert holds massive geoglyphs etched into the earth. We examine how these ancient markings were created…5 조회수
29:58