Oldest carving in East Asia found. But its maker is a mystery.

Cut bones dating back more than a hundred thousand years challenge the idea that our species was the only type of human with the capacity for abstract thought.

By Maya Wei-Haas
Published 25 Jul 2019, 18:59 BST
About the size of a thumb, this engraved bone fragment is one in a pair recently ...
About the size of a thumb, this engraved bone fragment is one in a pair recently unearthed in eastern China. The etchings push back the date of such abstract carvings in this region by tens of thousands of years.
Photograph by Francesco d’Errico & Luc Doyon

More than a hundred thousand years ago in what is now eastern China, an ancient human relative decided to carve a bit of bone. Surrounded by the fragmented skeletons of butchered animals, the ancient engraver chose a tidbit of rib hardened from its time under the sun and carved seven nearly parallel lines, highlighting them with a smear of vibrant ochre pigments.

Now, these straight lines are making waves among palaeoanthropologists, who believe that this tiny fragment, along with a second engraved bone found nearby, provide the oldest evidence of intentional symbolic carvings yet found in East Asia. If so, the find would beat the previous record holder by some 60,000 years, the team reports in the journal Antiquity.

The branch of the human family tree to which the artist belongs remains shrouded in time. But fossil skulls from an unknown species found near the bones hint that the carvings were not the handiwork of our species, Homo sapiens.

“Archaeological digs are full of mystery; you never know what you're going to discover,” study author Zhanyang Li of Shandong University says in an email. “A small object invisible to the eye can change people's understanding.”

While we’re far from understanding the purpose behind the newly described lines, or whether they are truly symbols, the deliberateness of their creation underscores the complexity of our ancient relatives’ behaviours and interactions with the natural world. The work also continues to challenge the outdated notion that modern humans were the only hominins with the cognitive capacity to think abstractly.

"It is really exciting work," says archaeologist Leslie Van Gelder of Walden University in Minneapolis. “We don’t have to know what it means, we just have to know that to the people making it, it meant something.”

Discovering a doodle

Scientists discovered the tiny pair of bones, each about the size of an adult’s thumb, at an open area known as the Linjing site in Henan Province. The region perhaps once harboured a spring, which drew an array of animals and hungry hominins to the region, speculates study author Francesco D’Errico of the Université de Bordeaux in France.

Researchers have uncovered thousands of bone fragments at the site, including remains from horses, extinct wild oxen known as aurochs, and donkey relatives called onagers. Many of the bones sport cut marks made when they were still fresh, evidence of many successful hunts. A collection of stone tools found at the site also revealed surprisingly sophisticated methods of tool shaping.

In 2016, while studying the fossil menagerie, researchers spotted clues to something even more intriguing: evidence of purposeful engraving.

For the latest work, the team began careful analysis of the shape and arrangement of the grooves in the two bones, revealing that they differed from butchery slashes in several ways. For one, the marks were much more shallow, indicating they were likely cut into a semi-fossilised rib. But the carved lines even dip into the pits in the bone, pointing to their creation with the sharpened tip of a rock as opposed to the long edge of a stone tool, which was more commonly used to cut meat.

The analysis also revealed a stunning number of details about the ancient carver. The hominin was likely right-handed, based on the lines' asymmetry and direction of carving. In spots where the tool seemed to dull, the hominin made several passes of the stone tip, etching multiple lines that nearly overlap.

Perhaps most telling, microscope images revealed red residue on one fragment, and chemical analysis showed that it contains traces of iron oxide not found in the sediments on the opposite side of the bone. This suggests that the pigments were not accidental: The mystery human relative likely smeared iron-rich clay called ochre into the lines to make them stand out.

Mysterious artists

On the surface, discovering a set of straight lines may not seem like a big deal, but “it’s not so much the lines themselves, it’s the deliberateness in the making of those lines,” Van Gelder explains. These marks weren’t just the product of random swipes of a tool across the surface of an old bone; they were created with thoughtfulness, she says.

Who exactly made these scratches, however, remains a mystery. Neanderthals likely didn’t venture this far into Asia; to date, we only know of Neanderthals making it as far east as Denisova cave in the Altai mountains—nearly 1,900 miles northwest of where the etched fragments were found. And it’s unclear if modern humans made it this far north at this early date.

The two fossil skulls found at the site contain a mosaic of ancient and modern features. Prior work hinted that they might be Denisovan, but thanks to the scant traces of Denisovan remains yet found, DNA evidence would be necessary to say for sure. Past research also suggested that Denisovans could be responsible for personal adornments, such as tooth pendants, found in Denisova cave. Still, scientists can’t exclude the possibility that modern humans had a hand in making those artifacts.

“My take on this is: It wasn’t purely modern humans,” University of Wisconsin-Madison paleoanthropologist John Hawks says of the capacity for crafting such material culture. “In fact, the idea that anything was ‘pure’ has gone by the wayside.”

The more scientists look, the more interspecies mingling they seem to find. Genetic evidence shows that when waves of modern humans began pouring out of Africa around 60,000 years ago, they met and interbred with at least two of their hominin cousins: Neanderthals and Denisovans. Along with this genetic exchange, there could have been a cultural exchange, too. 

“I don’t think they saw themselves as being different forms of humans,” says Hawks, who was not involved in the new study. The latest find joins a number of ancient carvings or ochre sketches popping up around the world that are attributed to a variety of human species.

The oldest known ancient art is a set of zigzags carved on a mussel shell found in Trinil, Indonesia, which dates to some 540,000 years ago and is interpreted as the work of Homo erectus. A 73,000-year-old hashtag-like mark appears to be a doodle made by early H. sapiens in the Blombos cave in South Africa. And a set of 65,000-year-old ochre sketches in the Cueva de los Aviones in southeastern Spain were possibly crafted by Neanderthals. 

“Modern behaviours do not seem to be the direct consequence of a speciation event creating modern humans, but more the result of shared cognition,” D’Errico says.

But what all these abstract forms mean is still up for debate, notes archaeologist Jillian Huntley of Griffith University. While she finds the new work fascinating, Huntley cautions that it’s unclear whether this latest carving and others like it are truly symbols for something, and even if they are, whether these abstract symbols translate to evidence of cognitive capacity.

“I think that’s a bit of a longer bow to draw,” Huntley says. Still, the latest find provides an intimate look into the lives—and perhaps the minds—of our ancient human relatives.

“And we’re just going to keep finding more,” Van Gelder says. “That’s the beauty of archaeology: Just when you think you know something, someone digs up the next thing.”


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