And the earliest evidence for it crops up somewhere between 80 and 120,000 years ago in Africa, when you see obsidian and jasper and other things moving long distances in Ethiopia.
Varaseim tõendus sellest on 80 kuni 120 000 aastat tagasi Aafrikast, kus laavaklaasist ja jaspisest esemed rändasid pikki vahemaid Etioopiasse.