The Human Evolution Timeline: 7 Million Years, One Long Walk

The human evolution timeline is one of the great stories in science: a 7-million-year chain of species that began as tree-climbing apes and ended with a globe-spanning, tool-making, storytelling animal. It is not a smooth march from primitive to advanced. It is a tangle of branches — most of them dead ends — from which only one twig, Homo sapiens, survives.

This guide walks the whole route in order, from the earliest possible hominins to modern humans. For each phase you will meet the key species, the landmark fossils, and roughly when they lived. If you want to see the branches in three dimensions, the site's interactive deep-time tree and the full species catalogue map every name below onto a living diagram.

Ma = million years ago; ka = thousand years ago. The dates below are best current estimates and shift as new fossils and dating methods appear.

The first hominins (7–4 million years ago)

The story opens in Africa, not with an ape that looked human but with an ape that had begun, tentatively, to stand up. Sahelanthropus tchadensis, known from a distorted skull nicknamed "Toumaï" found in Chad and dated to around 7 million years ago, sits close to the split between our line and the chimpanzee line. The position of the hole where its spinal cord entered the skull hints that it held its head over an upright body.

Two other early candidates followed. Orrorin tugenensis (~6 million years, Kenya) left thigh bones suggesting upright walking, and Ardipithecus ramidus (~4.4 million years, Ethiopia) is known from "Ardi," a remarkably complete skeleton described in 2009. Ardi could walk on two legs but still had a grasping big toe for climbing — a body caught between the trees and the ground. This awkward transition is the true beginning of the tale, and it is explored in depth in our guide to why humans started walking upright.

The australopithecines (4–2 million years ago)

By about 4 million years ago, upright walking was settled. The australopithecines ("southern apes") were fully bipedal but still small-brained, with skulls roughly the size of a chimpanzee's. The icon of this group is Lucy, an Australopithecus afarensis skeleton from Hadar, Ethiopia, about 3.2 million years old and discovered in 1974. Her pelvis and knee prove upright walking; her long arms and small ~400–500 cc braincase remained ape-like. The Laetoli footprints in Tanzania, preserved in volcanic ash ~3.6 million years ago, show the same species walking in a strikingly human stride.

Later came Australopithecus africanus (~3–2 million years, South Africa), first recognised from the child's skull known as the Taung Child in 1924. Alongside these "gracile" forms evolved a heavy-jawed side-branch, the Paranthropus group (~2.7–1.2 million years) — the "robust" australopithecines with enormous molars and flaring cheekbones built for grinding tough vegetation. Paranthropus was an evolutionary experiment that ultimately died out, a reminder that not every branch leads to us.

Early Homo and the first stone tools (2.8–1.9 Ma)

Around 2.8 million years ago, a jawbone from Ledi-Geraru in Ethiopia marks some of the earliest evidence of our own genus, Homo. The best-known early species, Homo habilis ("handy man"), lived roughly 2.4 to 1.5 million years ago and had a modestly larger brain (~510–690 cc) than the australopithecines.

This phase is defined less by anatomy than by behaviour: stone tools. The Oldowan industry — simple sharp flakes struck from cobbles, first named at Olduvai Gorge in Tanzania — appears by about 2.6–2.8 million years ago, and some cut-marked bones may push tool use even earlier. These crude choppers let hominins butcher carcasses and crack bones for marrow, opening up a richer, meatier diet that many researchers link to later brain growth. For how this toolmaker compares with its towering successor, see Homo habilis vs Homo erectus.

Homo erectus leaves Africa (1.9 Ma–110 ka)

Homo erectus is the great survivor of the human evolution timeline, lasting from about 1.9 million years ago to perhaps 110,000 years ago in Indonesia. Tall, long-legged and fully committed to life on the ground, it was the first hominin with roughly human body proportions. The Turkana Boy (Nariokotome, Kenya, ~1.6 million years) is a near-complete juvenile skeleton that revealed just how modern the erectus body plan was.

Crucially, Homo erectus was the first hominin to leave Africa. Fossils from Dmanisi in Georgia date to about 1.8 million years ago, and the species eventually reached China (Peking Man) and Java. It made the more refined Acheulean hand-axes and, at sites like Wonderwerk Cave and Gesher Benot Ya'aqov, shows the earliest good evidence for the controlled use of fire. You can trace these first departures on the migration atlas, and the deeper question of ape ancestry is covered in did humans evolve from apes?

Archaic humans (800–200 ka)

Between roughly 800,000 and 200,000 years ago, a group of big-brained "archaic" humans bridges Homo erectus and the later lineages. Homo antecessor (~850,000 years, Atapuerca, Spain) is among the oldest known humans in western Europe. The more widespread Homo heidelbergensis (~700,000–200,000 years) had brains approaching modern size and is a leading candidate for the last common ancestor of Neanderthals, Denisovans and ourselves.

The evidence for their sophistication is striking. At Schöningen in Germany, ~300,000-year-old wooden throwing spears show planned, cooperative big-game hunting. At the Sima de los Huesos ("Pit of Bones") in Spain, the remains of at least 28 individuals accumulated in a deep cave shaft — possibly the earliest hint of deliberate treatment of the dead. These populations were regionally variable, and untangling exactly who descended from whom remains one of the field's liveliest debates.

Neanderthals, Denisovans, and our origins (400–40 ka)

By about 400,000 years ago, the archaic lineages had begun to diverge. In western Eurasia they became the Neanderthals (Homo neanderthalensis), cold-adapted and heavily built, known from hundreds of skeletons. In Asia, their sister group the Denisovans ranged from Siberia to Tibet, so far known mostly from DNA and a handful of bones. How these two cousins differ is the subject of our Neanderthals vs Denisovans comparison.

Meanwhile, in Africa, Homo sapiens was taking shape. The oldest fossils assigned to our species come from Jebel Irhoud in Morocco, dated in 2017 to about 300,000 years ago — far older than the previous benchmark. The Omo Kibish remains from Ethiopia (~230,000 years, revised in 2022) and Herto (~160,000 years) trace the emergence of fully modern anatomy. Early sapiens was not confined to one spot but seems to have evolved across a patchwork of connected African populations. For a head-to-head on anatomy and behaviour, see Homo sapiens vs Neanderthals.

Modern humans spread across the world (70 ka–present)

Modern humans made brief early forays out of Africa — a jawbone at Misliya Cave in Israel dates to ~180,000 years — but the decisive, lasting dispersal began around 70,000–50,000 years ago. From this "Out of Africa" wave, Homo sapiens reached Australia by ~65,000–50,000 years ago, spread across Europe and Asia, and entered the Americas by at least ~15,000–23,000 years ago.

As they moved, they met the locals. Most people outside Africa carry roughly 2% Neanderthal DNA, and Denisovan ancestry peaks at 4–6% in Melanesians and Papuans — genetic proof that these groups interbred. From here the story shifts from bones to genomes: after the last archaic humans vanished around 40,000 years ago, the record of our recent history is written largely in DNA. To follow the routes and the mixing, explore the migration atlas, and to line species up side by side, try the species comparator.

Why the timeline is a bush, not a ladder

The most important idea in the whole human evolution timeline is also the most misunderstood. The famous "March of Progress" image — a single file of figures straightening up from ape to man — is wrong. Evolution did not aim at us, and it did not proceed in a neat line.

Instead the record is a branching bush. Multiple hominin species routinely coexisted: around 1.8 million years ago, Homo erectus, Homo habilis and robust Paranthropus all shared the African landscape. As recently as 40,000–50,000 years ago, our planet held Homo sapiens, Neanderthals, Denisovans, the tiny Homo floresiensis ("Hobbit") of Indonesia, and Homo luzonensis in the Philippines — at least five human species at once. Most branches ended, and the survivors sometimes interbred rather than simply replacing one another. We are not the top of a ladder; we are the last twig still growing on a once-crowded tree.