When Did Europeans Begin Hunting With Bows and Arrows?

TÜBINGEN, GERMANY—A SciNews report indicates that modern humans may have used bows and arrows during the early Upper Paleolithic, around 40,000 to 35,000 years ago. Previously, it was believed that Europeans hunted primarily with thrusting spears, only advancing to spear-throwers roughly 20,000 years ago and bows and arrows about 12,000 years ago, based on artifacts from Paleolithic sites.

Keiko Kitagawa and colleagues at the University of Tübingen conducted experiments by attaching replica stone, antler, and bone points to shafts and launching them as arrows, spears, and darts. They then compared the resulting wear patterns with those on prehistoric points. The findings suggest that early humans may have used multiple types of weapons simultaneously, adapting their hunting strategies to different environments and prey.

The researchers noted that the study highlights the complex nature of reconstructing prehistoric projectile technology, much of which relied on perishable materials.

Earliest Human Ancestor May Have Walked on Two Legs

A fossil belonging to an ancient hominin that lived seven million years ago bears the hallmarks of bipedalism, according to a new study

Aside from our large brains, one of the defining features that sets humans apart from other animals is our ability to walk upright on two legs—a form of movement unmatched elsewhere in the animal kingdom. Exactly when this trait first appeared in our ancestors has long been debated, but new fossil research suggests that the earliest known hominin was already developing traits linked to bipedalism.

Sahelanthropus tchadensis lived in north-central Africa about seven million years ago, around the time the hominin lineage diverged from that of chimpanzees and bonobos. When skull fragments of Sahelanthropus were uncovered in Chad in 2001, researchers immediately questioned whether the species walked upright. The position of the opening at the base of the skull, where the spinal cord enters, appeared suitable for supporting the head in an upright posture. However, with only part of a cranium available, the evidence was limited.

Later, scientists determined that a femur found near the skull fragments also belonged to Sahelanthropus. An initial analysis, published in 2020, concluded that the bone showed no signs of bipedalism, casting doubt on earlier interpretations and even on whether the species should be classified as a hominin. “The field is kind of split right now on how to interpret these fossils,” said Scott Williams, a paleoanthropologist at New York University and co-author of the new study, who was not involved in the 2020 research.

In a new study published in Science Advances, Williams and his colleagues challenge that conclusion. Using three-dimensional geometric morphometrics—a technique that allows precise measurement of fossil shapes—they identified early versions of several anatomical traits associated with bipedalism in later hominins, including Australopithecus and modern humans.

Two of these traits had been noted before: the inward twist of the femur and a small projection where the gluteus maximus muscle would attach. In 2022, a research team led by Guillaume Daver and Franck Guy of the University of Poitiers used these features to argue that Sahelanthropus was a habitual biped, meaning it regularly walked upright, unlike modern humans, who are obligate bipeds.

Williams identified an additional, more subtle feature. While examining the femur, he noticed a small bump where the iliofemoral ligament—a crucial structure for stabilizing upright walking—attaches in humans. “I was super excited about it,” he said. “It’s there; it’s just hard to see.” He later informed Daver and Guy, who independently confirmed the presence of this femoral tubercle.

Not all researchers agree with the interpretation. Marine Cazenave, a paleoanthropologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, who co-wrote a rebuttal to Daver and Guy’s 2022 study, argues that the new analysis provides only “weak evidence” for bipedalism. She notes that some primates that do not walk upright also have inward-twisted femurs. Regarding the femoral tubercle, Cazenave says its function remains unclear and that the fossil’s poor state of preservation makes it “impossible to determine the true extent of this feature.”

Even so, Williams maintains that Sahelanthropus was “clearly dependent on trees,” which it likely used for foraging, sleeping, and protection. However, he believes that when on the ground, the species moved on two legs and used its hands to carry food. With such limited fossil evidence, certainty remains elusive. Daver and Guy plan to revisit the original excavation site later this year in hopes of uncovering additional material that may have been overlooked. “Resolving the debate,” they said in a joint statement, “will require the discovery of new remains.”