Researchers led by a paleoanthropologist from the University of Victoria are shedding new light on how early humans lived a quarter of a million years ago.
The work carried out by April Nowell and her team reveals surprisingly sophisticated adaptations by early humans living 250,000 years ago in a former oasis near Azraq, Jordan.
The new research was published in the Journal of Archaeological Science.
The research team from UVic and partner universities in the US and Jordan has found the oldest evidence of protein residue—the residual remains of butchered animals including horse, rhinoceros, wild cattle and duck—on stone tools.
The discovery draws startling conclusions about how these early humans subsisted in a very demanding habitat, thousands of years before Homo sapiens first evolved in Africa.
“Researchers have known for decades about carnivorous behaviours by tool-making hominins dating back 2.5 million years, but now, for the first time, we have direct evidence of exploitation by our Stone Age ancestors of specific animals for subsistence,” says Nowell.
“The hominins in this region were clearly adaptable and capable of taking advantage of a wide range of available prey, from rhinoceros to ducks, in an extremely challenging environment.”
The team excavated 10,000 stone tools over three years from what is now a desert in the northwest of Jordan, but was once a wetland that became increasingly arid habitat 250,000 years ago.
The team closely examined 7,000 of these tools, including scrapers, flakes, projectile points and hand axes (commonly known as the “Swiss army knife” of the Paleolithic period), with 44 subsequently selected as candidates for testing.
Of this sample, 17 tools tested positive for protein residue, i.e. blood and other animal products.
“What this tells us about their lives and complex strategies for survival, such as the highly variable techniques for prey exploitation, as well as predator avoidance and protection of carcasses for food, significantly diverges from what we might expect from this extinct species,” continues Nowell.
“It opens up our ability to ask questions about how Middle Pleistocene hominins lived in this region and it might be a key to understanding the nature of interbreeding and population dispersals across Eurasia with modern humans and archaic populations such as Neanderthals.”
Photos: University of Victoria