Archaeologists from the University of Nairobi and the Field Museum have uncovered evidence of a previously unknown 'Ebony and Ivory' riverine trade network. By analyzing isotope signatures in artifacts found along the Tana River, researchers have traced a sophisticated 3,500-year-old exchange route connecting the interior highlands of the Upper Nile with the emerging coastal communities of the Swahili Coast.
The study reveals that this network was a critical precursor to the famous maritime Silk Road, facilitating the flow of luxury goods like tropical hardwoods, animal hides, and gold. This discovery challenges previous theories that the African interior was largely isolated from early global trade, proving the existence of complex inland logistics systems that operated millennia before colonial contact.