… several epochs during the last ice age when there was an easy migration route that allowed humans to quickly and easily move back and forth from the Persian Gulf region to East Africa along the Gihon River and over the land bridge connecting southwest Arabia to the Horn of Africa.1
Endnotes
Ash Parton et al., “Alluvial Fan Records from Southeast Arabia Reveal Multiple Windows for Human Dispersal,” Geology 43, no. 4 (April 2015): 295–98, doi:1130/G36401.1; Hugh Ross, “Did Arabia Provide a Migration Route for Early Humans?” Today’s New Reason to Believe (May 28, 2015).