Early Human Migrants Followed Lush Corridor-Route Out Of Africa | University of Southampton

Fig. 1. Map showing archaeological, paleoclimatological, and paleoenvironmental records from the Levant and Arabia mentioned in the text.
(A) The arrows indicate the suggested routes of human dispersals out of Africa [see (9, 17)]. The blue squares show sites with human fossils and footprints in northern Arabia, including those at Al Wusta paleolake (4) and Alathar paleolake (16), respectively. The green circles refer to paleolake/wetland sediments in the western desert of Egypt and Arabia, namely: Bir Tirfawi and Bir Sahara (52), Khall Amayshan (21), Mundafan (22), Khujaymah (22), and Saiwan (60). The green triangles show speleothem deposition in caves in the eastern desert of Egypt, including Saqia cave (43), Wadi Sannur (45), and in southern Arabia including Hoti cave in Oman and Mukkala cave in Yemen (23, 59). The main dated archaeological site in southeastern Arabia is Jebel Faya in the UAE (blue rhombus) (24, 58).
(B) Digital elevation model map of the Levant showing the location of the study areas (yellow stars) along the Jordan Rift Valley (Wadi Gharandal and Gregra) and in the Jordanian Plateau (Wadi Hasa), and the paleolakes and speleothem records in the region. Paleolakes are represented by green circles, namely: Qa'a Azraq (53), Jurf Ed Darawish (26, 32), Lake Elji (54), Qa'a Jafr (27, 55), and Qa'a Mudawwara (28). Speleothem records in the Levant include Soreq cave (green triangle) (44, 46), and the blue squares show sites with human fossils including Skhul and Qafzeh caves (5). The source of digital elevation model data is derived from www.gscloud.cn.
There are several possible routes by which they could have migrated into Eurasia and from there into the rest of the world, and archaeologists have just reported finding just one such route up the East African coast, across the Sinai Peninsula, down the Red Sea coast of Arabia, through what is now Yemen and Oman and from there to Coastal South Asia.
An alternative route could have been to cross the narrow sea crossing at the southern end of the Red Sea, to southern Arabia and then go north to the Jordan Valley or along the southern coast of Arabia to Oman.
This conclusion comes from the fact that at that time, the Jordan Valley was a “well-watered corridor” which funneled hunter-gatherers through The Levant towards western Asia and northern Arabia via Jordan. Wandering tribes of hunter-gatherer have no particular destination in mind and would have migrated through where the environment provided food and water, so a watered corridor would naturally provide such a route.
This discovery was made by researchers from the University of Southampton (UK) and Shantou University (China), together with colleagues in Jordan, Australia and the Czech Republic. It is published open access in Science Advances and is explained in a press release from Southampton University: