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From the Beginning of Time

Human Evolution

• First human‑like creatures: Early ancestors of humans appeared around 5.6 million years ago.
• Modern humans: Anatomically modern humans (Homo sapiens) originated approximately 160,000 years ago.
• Evidence sources: Fossils, stone tools and cave paintings provide the principal evidence for early human history.
• Initial resistance to the idea: About 200 years ago many scholars were sceptical of evolutionary explanations because of literal interpretations of sacred texts that described human origins as an act of divine creation.
• Discovery in the Neander Valley (1856): Quarry workers in the Neander Valley, Germany, discovered a skull and skeletal fragments and reported them to Carl Fuhlrott, a local naturalist.
• Scientific investigation: Fuhlrott consulted anatomist Herman Schaaffhausen at Bonn University; together they argued the remains belonged to an extinct human form.
• Darwin's contribution: On 24 November 1859, Charles Darwin published On the Origin of Species, proposing natural selection and the descent of species, which laid the groundwork for understanding human evolution.

The Story of Human Evolution

Human evolution: an overview

• Human evolution is a long, branching process spanning millions of years. A group of primates called hominoids emerged about 24 million years ago in Africa and Asia; hominoids include the ancestors of apes and humans.

Hominids: the next step in evolution

• Hominids evolved from hominoids. They belong to the family Hominidae and include several genera, most importantly Australopithecus and Homo.
• Hominids share some features with other hominoids but show pronounced adaptations for upright walking, changes in brain size and tool use.

Differences between hominoids and hominids

Types of Homo

Homo habilis (about 2.2 million years ago)

• Meaning: "Tool maker".
• Key fossil sites: Omo (Ethiopia) and Olduvai Gorge (East Africa).

Homo erectus (about 1.8 million years ago)

• Meaning: "Upright man".
• Geographical spread: Fossils found in Africa and Asia; associated with more advanced tools and use of fire in some contexts.

Homo sapiens

• Meaning: "Wise man".
• Members of the genus Homo appear in the fossil record at different times; anatomically modern humans (Homo sapiens) are dated to roughly 160,000 years ago, while some archaic Homo forms appear earlier.
• Fossil distribution: Africa, Asia and Europe have yielded important Homo fossils.

Fossils associated with Homo and related forms

• Homo heidelbergensis: An archaic Homo found near Heidelberg, Germany; often considered an ancestor of both Neanderthals and modern humans in Europe.
• Homo neanderthalensis: Fossils from the Neander Valley were classified as Neanderthals, a group adapted to cold climates in Europe and western Asia.

Benefits of bipedalism (upright posture)

• Carrying objects: Upright posture freed the arms and hands, enabling carrying of food, tools and infants.
• Visual surveillance: Standing provided a better view of the surroundings for spotting predators and prey.
• Long‑distance walking: Bipedalism is energy‑efficient for endurance walking and running, useful in hunting and foraging.
• Energy efficiency: Walking on two legs uses less energy for long distances compared with quadrupedal locomotion in many contexts.

Glaciation and its impact

Glaciation, beginning around 2.5 million years ago, caused major climate shifts: lower temperatures, reduced rainfall and the expansion of grasslands. This environmental change affected species differently. Some australopithecine populations declined or went extinct, while species better adapted to drier open habitats, including the evolving Homo lineages, were able to survive and diversify.

Theories on the origin of modern humans

Two principal models explain the origin and dispersal of modern humans:

Regional continuity model (Multi‑regional origin)

• This model proposes that modern humans evolved simultaneously in different parts of the Old World from local archaic human populations.
• Regional variation in modern human features is attributed to long‑term continuity and limited gene flow between populations such as Homo heidelbergensis and Homo neanderthalensis.

Replacement model (Single‑region origin, "Out of Africa")

• This model suggests anatomically modern humans originated in Africa and later dispersed, replacing archaic human populations elsewhere.
• Genetic and anatomical evidence - including homogeneity among modern human populations and early modern fossils like those from Omo, Ethiopia - supports a primary African origin for Homo sapiens.

Early humans: ways of obtaining food

Early humans used multiple strategies to obtain food depending on environment, season and technology available:

Gathering

• Collection of plant foods such as seeds, nuts, berries, fruits and tubers formed an essential and reliable part of the diet.

Scavenging

• Early humans scavenged meat from carcasses left by predators and opportunistically foraged small animals, birds, reptiles and insects.

Hunting

• Hunting becomes clear in the archaeological record by about 500,000 years ago and evidence for planned hunting appears at sites such as Boxgrove (southern England), Schöningen (Germany) and Dolní Věstonice (Czech Republic).
• Riverside locations were often chosen because migratory herds crossed such points seasonally, creating predictable opportunities for hunting.

Fishing

• Bone assemblages and fish remains at archaeological sites show that fishing was a significant food source where water bodies were available.

Early humans: from trees to caves and open‑air sites

• The distribution of artefacts indicates preferred living places and patterns of repeated occupation.
• Large concentrations of flake tools and hand axes are found at sites such as Kilombe and Olorgesailie in Kenya.
• Some locations abundant in food were visited repeatedly, causing artefacts to accumulate in layers; other spots used intermittently show scattered surface finds.
• Between roughly 400,000 and 125,000 years ago, there is clear evidence that early humans used caves and open‑air shelters.
• At the Lazaret cave (southern France), archaeologists uncovered a 12 × 4 metre shelter with two hearths and remains of varied food sources.
• At Terra Amata (southern France) simple seasonal shelters made of wood and grass indicate short‑term occupation patterns.
• Some South African sites have yielded baked clay fragments, burnt bone and stone tools; whether all such remains resulted from controlled use of fire or natural fires is sometimes debated.

The uses of fire

• Provide warmth and light in caves.
• Harden wood and make tools more durable.
• Scare away dangerous animals and clear areas.
• Cooking food, which improves digestibility and reduces pathogens.
• Assist in flaking and shaping stone tools.

Early humans and tool making

• Tool making required advanced memory, planning and organisational skill. The earliest stone tools are found in Ethiopia and Kenya, associated with early hominins such as Australopithecus and early Homo.
• Around 35,000 years ago there were notable changes in hunting technology: introduction of spear‑throwers and later the bow and arrow.
• Meat processing techniques-removing bones, drying, smoking and storing-allowed seasonal storage and later consumption.
• Trapping fur‑bearing animals and production of clothing (evidence of sewn garments around 21,000 years ago) improved survival in cold climates.
• The punch‑blade technique enabled production of small chisel‑like tools and precise engravings on bone, antler, ivory and wood.

Modes of communication: language and art

Language

Humans are unique among living species in possessing fully developed, symbolic language. The origin of speech is debated; various ideas include gestural origins, vocal calls elaborated into speech, or gradual development from non‑verbal vocalisations.

• Some hypotheses propose early language was based on gestures or hand movements.
• Other views suggest vocal but non‑verbal communication preceded structured speech.
• Some scholars link the evolution of speech to features in the brain and vocal tract; changes in vocal anatomy around 200,000 years ago were important for complex speech.
• Both language and art may have become prominent together, with strong evidence for symbolic behaviour about 40,000–35,000 years ago.

Art of prehistoric people

Cave paintings from Lascaux and Chauvet (France) and Altamira (Spain) depict many animals - bison, horses, ibex, deer, mammoths, rhinoceros, lions, bears, panthers, hyenas and owls. The purpose of these paintings is uncertain but several theories exist:

• Ritualistic significance: Paintings may have been part of rituals intended to ensure hunting success.
• Gathering and teaching places: Caves might have been meeting places where hunting knowledge, techniques and cultural information were shared; the paintings could have functioned as mnemonic or instructional images.

Hunter‑gatherer societies: using the present to understand the past

There are two contrasting scholarly views on whether present‑day hunter‑gatherer societies can help interpret archaeological remains:

• Some scholars directly apply ethnographic data from contemporary hunter‑gatherers to infer behaviour at archaeological sites; for example, interpreting sites dated to ~2 million years ago near Lake Turkana as seasonal dry‑season camps, analogous to practices among the Hadza and the Khoisan.
• Other archaeologists caution against straightforward analogy because modern hunter‑gatherers often live under conditions very different from those of the Pleistocene: they pursue diverse economic activities, trade minor forest produce, work as labourers, and are frequently marginalised geographically, politically and socially.

Points commonly emphasised by critics of direct analogy:

• Present‑day hunter‑gatherers often combine hunting and gathering with other livelihood activities, including exchange and wage labour.
• These groups live under modern socio‑political pressures and environmental constraints that differ markedly from those faced by early hominins.
• There is great variation among living hunter‑gatherer societies in group size, mobility, gender roles and the relative importance of hunting versus gathering.
• Both men and women contribute substantially to the food supply in many contemporary hunter‑gatherer groups.

Key words and their meanings

Fossils

Fossils are the preserved remains or impressions of ancient plants, animals or humans that, through processes such as mineral replacement, become preserved in rock for millions of years.

Species

A species is a group of organisms that can interbreed to produce fertile offspring; members of different species generally cannot produce viable, fertile young.

Anthropology

Anthropology is the scientific study of humans, human behaviour and societies, including both cultural practices and biological evolution.

Artefacts

Artefacts are objects made or modified by humans - tools, ornaments, paintings, sculptures and other material traces of human activity.

Primates

• Primates are an order of mammals that includes monkeys, apes and humans.
• Typical primate features include grasping hands, forward‑facing eyes, relatively large brains and varied dentition; primates exhibit extended parental care and complex social behaviour.

Ethnography

• Ethnography is the qualitative study of present‑day peoples and cultures, often through participant observation; it documents how groups make a living, the technologies they use, gender roles, rituals, politics and social organisation.

Passage‑based references and notable sites

• Olduvai Gorge: Located in the Rift Valley of East Africa, Olduvai Gorge was systematically studied by Mary and Louis Leakey for decades. In 1959 Mary Leakey discovered important remains attributed to early hominins, including australopithecine and early Homo fossils.
• The Hadza: The Hadza are a contemporary community of hunter‑gatherers living near Lake Eyasi in the Rift Valley. They rely heavily on wild foods; their camps are generally located near trees or rocks and within about a kilometre of a water source, illustrating patterns of mobility and camp placement relevant for ethnographic analogy.
• Altamira: A cave site in northern Spain famous for its vivid prehistoric cave paintings that provide insight into symbolic behaviour and artistic expression among Upper Palaeolithic peoples.