Human Evolution Explorer

160 Million Years of Evolution

Human Evolution Explorer

Explore 160 million years of evolution — from tiny Jurassic mammals to modern Homo sapiens — through 11 key fossil stages. Chat with Dr. Elena Marsh to go deeper.

11 Stages of Evolution

Each card represents a species that marks an important moment in the long journey toward modern humans.

Scientific illustration of Juramaia sinensis, Early eutherian mammal
01

About 160 million years ago

Juramaia sinensis

Early eutherian mammal

A tiny, shrew-like creature that represents one of the earliest known placental mammals — a pivotal branch point in the story of all eutherian life.

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Scientific illustration of Purgatorius, Early primate-like mammal
02

About 66 million years ago

Purgatorius

Early primate-like mammal

One of the earliest known primatomorphs, Purgatorius appeared at the dawn of the Cenozoic era and may represent an early branch near the origin of the primate lineage.

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Scientific illustration of Aegyptopithecus zeuxis, Early catarrhine primate
03

About 30 million years ago

Aegyptopithecus zeuxis

Early catarrhine primate

An early catarrhine primate from Egypt that provides a critical window into the evolutionary stage before the divergence of Old World monkeys and apes.

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Scientific illustration of Proconsul, Early ape
04

About 21 million years ago

Proconsul

Early ape

An early Miocene ape from East Africa that lacked a tail and possessed a combination of monkey and ape features, representing a pivotal stage in ape evolution.

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Scientific illustration of Sahelanthropus tchadensis, Very early hominin
05

About 7 to 6 million years ago

Sahelanthropus tchadensis

Very early hominin

One of the oldest known potential hominins, discovered in Chad, showing a mix of ape-like and human-like features that places it near the crucial split between human and chimpanzee lineages.

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Scientific illustration of Ardipithecus ramidus, Ardi / Early hominin
06

About 4.4 million years ago

Ardipithecus ramidus

Ardi / Early hominin

Known informally as 'Ardi,' this early hominin from Ethiopia challenged assumptions about human evolution by combining bipedal walking with tree-climbing adaptations.

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Scientific illustration of Australopithecus afarensis, Lucy's species
07

About 3.9 million years ago

Australopithecus afarensis

Lucy's species

Famous as 'Lucy's species,' Australopithecus afarensis was a committed biped with a small brain that thrived for over a million years in East Africa.

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Scientific illustration of Homo habilis, Handy man
08

About 2.4 million years ago

Homo habilis

Handy man

The first member of the genus Homo, Homo habilis was associated with early stone tool use and marks a pivotal transition in the human evolutionary story.

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Scientific illustration of Homo erectus, Upright human
09

About 1.9 million years ago

Homo erectus

Upright human

The first hominin to leave Africa and spread across much of the Old World, Homo erectus was a highly successful species with advanced tools and possibly the first use of fire.

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Scientific illustration of Homo heidelbergensis, Archaic human
10

About 700,000 years ago

Homo heidelbergensis

Archaic human

A large-brained archaic human that lived in Africa and Europe, likely ancestral to both Neanderthals and modern humans, showing evidence of advanced hunting and possible symbolic behavior.

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Scientific illustration of Homo sapiens, Modern human
11

About 300,000 years ago

Homo sapiens

Modern human

Anatomically modern humans who emerged in Africa around 300,000 years ago, developed complex language, art, and culture, and eventually spread to every corner of the planet.

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How to Interpret This Evolutionary Path

The 11 species featured here are not presented as a guaranteed direct ancestor-to-descendant chain. Evolution does not work like a straight ladder. Instead, think of it as an enormously complex branching tree — with lineages splitting, diverging, and sometimes going extinct.

Each species on this site represents an important evolutionary stage — either a known close relative, a well-documented fossil from near the lineage leading to modern humans, or a species that illustrates a key transition. Scientists continue to debate the exact relationships between many of these species, and new fossil discoveries regularly refine our understanding.

The dates given are approximations based on current fossil and molecular evidence. When you see "first appeared," it means the earliest fossil evidence found so far — not necessarily when the species actually originated.

Dr. Elena Marsh

Have a Question?

Meet Dr. Elena Marsh — our evolutionary biology expert. Ask anything about human evolution, the fossil record, or the 11 stages on this site.