Six years now
> In January, 2013, the journalist @PaulSalopek [https://twitter.com/PaulSalopek?ref_src=twsrc%5Etfw] set out on foot to retrace the pathways blazed by the first Homo sapiens, who left Africa to discover the world about 60,000 years ago.https://t.co/7o2i1z1Res — The New Yorker (@NewYorker) June…