Human Evolution
7.0 Million Years Ago (mya)
└── SAHELANTHROPUS TCHADENSIS
├── Timeframe: 7.0–6.0 mya
├── Key Discovery: "Toumaï" (Chad, Central Africa)
├── Brain Size: ~350 cc (Chimpanzee-sized)
└── Key Traits: Oldest known hominin; placement of the spinal cord opening (foramen magnum) suggests a transitional form of walking upright.
:
6.0 mya
└── ORRORIN TUGENENSIS
├── Timeframe: 6.1–5.7 mya
├── Key Discovery: Tugen Hills, Kenya
└── Key Traits: Femur (thigh bone) shape strongly indicates bipedalism, but arm bones show they were still adapted for climbing trees.
:
4.4 mya
└── ARDIPITHECUS RAMIDUS
├── Timeframe: 4.4 mya
├── Key Discovery: "Ardi" (Afar Desert, Ethiopia)
├── Brain Size: ~300–350 cc
└── Key Traits: Divergent, grasping big toe for tree climbing, but a rigid foot structure that allowed for clumsy walking on two legs.
:
4.0 mya
└── AUSTRALOPITHECUS AFARENSIS
├── Timeframe: 3.9–2.9 mya
├── Key Discovery: "Lucy" (Hadar, Ethiopia) & Laetoli footprints (Tanzania)
├── Brain Size: ~400–500 cc
└── Key Traits: Fully bipedal but retained long arms for climbing; lacked the large canine teeth of earlier apes.
:
3.0 mya
└── AUSTRALOPITHECUS AFRICANUS
├── Timeframe: 3.3–2.1 mya
├── Key Discovery: "Taung Child" (South Africa)
├── Brain Size: ~450–550 cc
└── Key Traits: Rounder cranium housing a slightly larger brain; less ape-like facial features than A. afarensis.
:
2.4 mya
└── HOMO HABILIS
├── Timeframe: 2.4–1.4 mya
├── Meaning: "Handy Man" (Olduvai Gorge, Tanzania)
├── Brain Size: ~500–700 cc (Significant brain expansion)
└── Key Traits: First widespread, confirmed use of stone tools (Oldowan tool industry); smaller teeth and a flatter face.
:
1.9 mya
└── HOMO ERECTUS
├── Timeframe: 1.89 million to 110,000 years ago
├── Key Discovery: Turkana Boy (Kenya), Java Man (Indonesia), Peking Man (China)
├── Brain Size: ~700–1,100 cc
└── Key Traits: First hominin to leave Africa; first to master fire and cook food; created advanced Acheulean handaxes; possessed modern human body proportions.
:
700,000 Years Ago
└── HOMO HEIDELBERGENSIS
├── Timeframe: 700,000–200,000 years ago
├── Locations: Africa, Europe, and Asia
├── Brain Size: ~1,200 cc
└── Key Traits: Direct ancestor to both Neanderthals and Homo sapiens; built temporary wooden shelters and used spears to hunt large game.
:
300,000 Years Ago
├── HOMO NEANDERTHALENSIS (The Neanderthals)
│ ├── Timeframe: 400,000–40000 years ago
│ ├── Locations: Europe and Southwestern/Central Asia
│ ├── Brain Size: ~1,400–1,600 cc (Larger than modern humans, but shaped differently)
│ └── Key Traits: Stocky, cold-adapted bodies; buried their dead; used advanced tools; controlled fire and language; interbred with Homo sapiens.
│
└── HOMO SAPIENS (Anatomically Modern Humans)
├── Timeframe: 300,000 years ago to the Present
├── Origin: Africa, then expanded globally
├── Brain Size: ~1,350 cc average
└── Key Traits: High, rounded skull with a vertical forehead and a distinct chin; highly complex language, symbolic thought, art, global agriculture, and civilization.


mya is a short form of Million Years Ago mya