Evolution

Ancient humans used complex hunting techniques to ambush and kill antelopes, gazelles, wildebeest and other large animals at least two million years ago. The discovery – made by anthropologist Professor Henry Bunn of Wisconsin University – pushes back the definitive date for the beginning of systematic human hunting by hundreds of thousands of years.

Two million years ago, our human ancestors were small-brained apemen and in the past many scientists have assumed the meat they ate had been gathered from animals that had died from natural causes or had been left behind by lions, leopards and other carnivores.

But Bunn argues that our apemen ancestors, although primitive and fairly puny, were capable of ambushing herds of large animals after carefully selecting individuals for slaughter. The appearance of this skill so early in our evolutionary past has key implications for the development of human intellect.

"We know that humans ate meat two million years ago," said Bunn, who was speaking in Bordeaux at the annual meeting of the European Society for the study of Human Evolution (ESHE). "What was not clear was the source of that meat. However, we have compared the type of prey killed by lions and leopards today with the type of prey selected by humans in those days. This has shown that men and women could not have been taking kill from other animals or eating those that had died of natural causes. They were selecting and killing what they wanted."

That finding has major implications, he added. "Until now the oldest, unambiguous evidence of human hunting has come from a 400,000-year-old site in Germany where horses were clearly being speared and their flesh eaten. We have now pushed that date back to around two million years ago."

The hunting instinct of early humans is a controversial subject. In the first half of the 20th century, many scientists argued that our ancestors' urge to hunt and kill drove us to develop spears and axes and to evolve bigger and bigger brains in order to handle these increasingly complex weapons. Extreme violence is in our nature, it was argued by fossil experts such as Raymond Dart and writers like Robert Ardrey, whose book African Genesis on the subject was particularly influential. By the 80s, the idea had run out of favour, and scientists argued that our larger brains evolved mainly to help us co-operate with each other. We developed language and other skills that helped us maintain complex societies.

"I don't disagree with this scenario," said Bunn. "But it has led us to downplay the hunting abilities of our early ancestors. People have dismissed them as mere scavengers and I don't think that looks right any more."

In his study, Bunn and his colleagues looked at a huge butchery site in the Olduvai Gorge in Tanzania. The carcasses of wildebeest, antelopes and gazelles were brought there by ancient humans, most probably members of the species Homo habilis, more than 1.8 million years ago. The meat was then stripped from the animals' bones and eaten.

"We decided to look at the ages of the animals that had been dragged there," said Benn. "By studying the teeth in the skulls that were left, we could get a very precise indication of what type of meat these early humans were consuming. Were they bringing back creatures that were in their prime or were old or young? Then we compared our results with the kinds of animals killed by lions and leopards."

The results for several species of large antelope Bunn analysed showed that humans preferred only adult animals in their prime, for example. Lions and leopards killed old, young and adults indiscriminately. For small antelope species, the picture was slightly different. Humans preferred only older animals, while lions and leopards had a fancy only for adults in their prime.

"For all the animals we looked at, we found a completely different pattern of meat preference between ancient humans and other carnivores, indicating that we were not just scavenging from lions and leopards and taking their leftovers. We were picking what we wanted and were killing it ourselves."

Bunn believes these early humans probably sat in trees and waited until herds of antelopes or gazelles passed below, then speared them at point-blank range. This skill, developed far earlier than suspected, was to have profound implications. Once our species got a taste for meat, it was provided with a dense, protein-rich source of energy. We no longer needed to invest internal resources on huge digestive tracts that were previously required to process vegetation and fruit, which are more difficult to digest. Freed from that task by meat, the new, energy-rich resources were then diverted inside our bodies and used to fuel our growing brains.

As a result, over the next two million years our crania grew, producing species of humans with increasingly large brains – until this carnivorous predilection produced Homo sapiens.

3.2. Middle Palaeolithic Hunting: Sites such as Zwolen (Gautier, 1989) and Mauran (Farrzy & David, in press; Girard-Farrzy & Leclerc,1981) preserve clear evidence of active hunting. 

Planning: killings are less often occasional. Neanderthal man returns periodically (or seasonally) to special places rich in game and with a natural topography propitious to hunting activities. This testifies to an intentional and calculated choice, as at the sites already mentioned. 

Specialisation: sometimes man specialises in the capture of a particular animal species: big bovids at Mauran (Farizy & David, in press), horses at Zwolen (Gautier, 1989), wild goats at the Grotte de l'Hortus (de Lumley, 1971). 

Hunting techniques: probably some kind of game driving was practised at Mauran (Farizy & David, in press), Zwolen (Gautieq, 1989), La Quina (Jelinek, Debenath & Dibble, 7989) and La Cotte de Saint-Brelade (Scott, 1e80). 

Seasonal killings: many killings are probably seasonal, animals fall in discrete age groups at Zwolen (Gautieq, 1989) and La Quina (]elinek, Debenath & Dibble, 1989). 

Food transport: the lightest and most meaty bones (hind limbs, pulni, ribs, vertebrae) may be carried away. In kill sites man leaves big and useless parts of animal skeletons (skulls, jaws etc.). Transport of meaty skeletal parts may be exemplified at Mauran (Farizy & David, in press). 

Butchering activities: at Maurary Farizy and David (Fafizy & David, in press) notice many phases in the butchering process: dismemberment, removal of muscular masses and bone breakage for marrow extraction.

Upper Palaeolithic and Mesolithic Hunting: 

the archaeological record leaves us some direct evidence of man's hunting activities. At Meiendorf (Rust 1937) and Stellmoor (Rusf 1937), some bones of reindeer and birds still conserve weapon marks and a few pieces of silex have remained thrusted in mammalian bones; man kills reindeer with harpoons and sticks (fractured skulls), birds with bows and maybe slings. Three fractured skulls of red deer in Abri Pataud (Bouchud, 1975), and one bovid skull with a circular orifice in Saint Marcel (Allain, 1952) suggest the practice of the so called " co'up de merlin": man has delivered a blow similar to the one used today to butcher cattle. Probably the animal already immobilized (wounded or entrapped) was hit on the frontal with a big stone. At Kokorevo I (Siberia), a large scapula of bison is pierced by the upper end of a point made of bone (Boriskowksi, 1965). At High Furlong (Mesolithic), an elk was discovered with the marks of L7 wounds made by barbed points, of which two were found in the site, and by other arms. The animal had apparently been attacked at two distinct occasions: during the first one, hunters aimed at the legs to lame the animal (fig. 6), later hunters hit the thoracic region and the lungs to kill it. However the elk died in a little lake, perhaps imprisoned in the ice, and man had no access to the meat. The animal represents in fact a hunting loss (Hallam et a1.,1973). 

Planning: very good. Many sites belong to Wpe e, were occupied periodically or seasonally and specialised in the capture of a particular game (e.g., horse, reindeeq, ibex). Game drive towards cliffs have been claimed and Solutre (Combier & Thevenot,1976) has long figured as an example, but the evidence is far from conclusive. 

Scavenging: no doubt H. sapiens still killed or exploited animals in the occasional and opportunistic way of Lower Palaeolithic times. According to Lindner (Lindner,1941), hunters at Predmost utilised the carcasses of hundreds of mammoths that probably succumbed as a result of natural catastrophes, as food. 

Food transport: selective transport of the most useful animal parts is claimed for many sites. 

Specialised activities: sometimes the material is dislocated in distinct clusters that could reflect specialised activity areas as for example at Solutre (Combier & Thevenot, 1976). Site topography: some hunting sites were located in valleys enclosed by steep slopes as at Rascano (Gonziilez-Echegaray, 1979), Stellmoor (Rust, 1937), Meiendorf (Rust 1937), or at the foot of rocky cliffs at Solutr6 (Combier & Th6venot, 1,976). 

4. Conclusions 

Most of the Lower Palaeolithic sites analysed here belong to category a (butchering sites); other kind of concentrations are rare and difficult to ascertain. A number of hunting stations (category e) and a hunting stop (category f) form my sample for the age of Neanderthal man and related people. The Upper Palaeolithic is characterised by many hunting stations, while in Mesolithic times a hunting loss (category d ) was found as well as several sighting sites (category g). The foregoing distribution seems to reflect in a vague way an evolution from scavenging and haphazard opportunistic hunting to well organised, selective hunting activities. However, this reflection results no doubt in part from a priori assumptions concerning the evolution of hominid meat procurement often colouring the interpretations offered for the osseous "hard" data; these are frequently equivocal.